75399552 has 64 divisors (see below), whose sum is σ = 222543600. Its totient is φ = 25132032.

The previous prime is 75399547. The next prime is 75399553. The reversal of 75399552 is 25599357.

75399552 is a `hidden beast` number, since 7 + 5 + 3 + 99 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 75399498 and 75399507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75399553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7453 + ... + 14364.

Almost surely, 2^75399552 is an apocalyptic number.

75399552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

75399552 is an abundant number, since it is smaller than the sum of its proper divisors (147144048).

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

75399552 is a wasteful number, since it uses less digits than its factorization.

75399552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21840 (or 21822 counting only the distinct ones).

The product of its digits is 425250, while the sum is 45.

The square root of 75399552 is about 8683.2915418060. The cubic root of 75399552 is about 422.4638849655.

The spelling of 75399552 in words is "seventy-five million, three hundred ninety-nine thousand, five hundred fifty-two".