525491328 has 32 divisors (see below), whose sum is σ = 1395837360. Its totient is φ = 175163648.

The previous prime is 525491287. The next prime is 525491359. The reversal of 525491328 is 823194525.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×525491328² = 552282271606407168, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 683850 + ... + 684617.

Almost surely, 2^525491328 is an apocalyptic number.

It is an amenable number.

525491328 is an abundant number, since it is smaller than the sum of its proper divisors (870346032).

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

525491328 is a wasteful number, since it uses less digits than its factorization.

525491328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368484 (or 1368472 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 525491328 is about 22923.5976234098. The cubic root of 525491328 is about 806.9659025377.

The spelling of 525491328 in words is "five hundred twenty-five million, four hundred ninety-one thousand, three hundred twenty-eight".