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30040000 = 2654751
BaseRepresentation
bin111001010010…
…1111111000000
32002112012010121
41302211333000
530142240000
62551510024
7513223114
oct162457700
962465117
1030040000
1115a58551
12a088314
1362ba263
143dbd744
152985b1a
hex1ca5fc0

30040000 has 70 divisors (see below), whose sum is σ = 74588624. Its totient is φ = 12000000.

The previous prime is 30039983. The next prime is 30040009. The reversal of 30040000 is 4003.

Adding to 30040000 its reverse (4003), we get a palindrome (30044003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39625 + ... + 40375.

Almost surely, 230040000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37294312).

30040000 is an abundant number, since it is smaller than the sum of its proper divisors (44548624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30040000 is an frugal number, since it uses more digits than its factorization.

30040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 30040000 is about 5480.8758424179. The cubic root of 30040000 is about 310.8612884859.

The spelling of 30040000 in words is "thirty million, forty thousand", and thus it is an eban number.

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500 625 751 800 1000 1250 1502 1600 2000 2500 3004 3755 4000 5000 6008 7510 8000 10000 12016 15020 18775 20000 24032 30040 37550 40000 48064 60080 75100 93875 120160 150200 187750 240320 300400 375500 469375 600800 751000 938750 1201600 1502000 1877500 3004000 3755000 6008000 7510000 15020000 30040000