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30040006 = 247931357
BaseRepresentation
bin111001010010…
…1111111000110
32002112012010211
41302211333012
530142240011
62551510034
7513223123
oct162457706
962465124
1030040006
1115a58557
12a08831a
1362ba269
143dbd74a
152985b21
hex1ca5fc6

30040006 has 8 divisors (see below), whose sum is σ = 45155520. Its totient is φ = 14988168.

The previous prime is 30039983. The next prime is 30040009. The reversal of 30040006 is 60004003.

It is a sphenic number, since it is the product of 3 distinct primes.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14721 + ... + 16636.

It is an arithmetic number, because the mean of its divisors is an integer number (5644440).

Almost surely, 230040006 is an apocalyptic number.

30040006 is a deficient number, since it is larger than the sum of its proper divisors (15115514).

30040006 is a wasteful number, since it uses less digits than its factorization.

30040006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31838.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30040006 is about 5480.8763897756. The cubic root of 30040006 is about 310.8613091824.

Adding to 30040006 its reverse (60004003), we get a palindrome (90044009).

The spelling of 30040006 in words is "thirty million, forty thousand, six", and thus it is an eban number.

Divisors: 1 2 479 958 31357 62714 15020003 30040006