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75000000 = 26358
BaseRepresentation
bin1000111100001…
…10100011000000
312020010101122210
410132012203000
5123200000000
611235302120
71600326615
oct436064300
9166111583
1075000000
1139376679
122114a940
13126cc5ca
149d6450c
1568b7350
hex47868c0

75000000 has 126 divisors (see below), whose sum is σ = 248046748. Its totient is φ = 20000000.

The previous prime is 74999959. The next prime is 75000007. The reversal of 75000000 is 57.

Multipling 75000000 by its sum of digits (12), we get a square (900000000 = 300002).

75000000 divided by its sum of digits (12) gives a 4-th power (6250000 = 504).

Adding to 75000000 its reverse (57), we get a palindrome (75000057).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 75000000.

It is not an unprimeable number, because it can be changed into a prime (75000007) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14999998 + ... + 15000002.

Almost surely, 275000000 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 75000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124023374).

75000000 is an abundant number, since it is smaller than the sum of its proper divisors (173046748).

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

75000000 is an frugal number, since it uses more digits than its factorization.

75000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 35, while the sum is 12.

The square root of 75000000 is about 8660.2540378444. The cubic root of 75000000 is about 421.7163326509.

The spelling of 75000000 in words is "seventy-five million", and thus it is an aban number and an uban number.