525821928 has 16 divisors (see below), whose sum is σ = 1314554880. Its totient is φ = 175273968.

The previous prime is 525821927. The next prime is 525821971. The reversal of 525821928 is 829128525.

It is a self number, because there is not a number n which added to its sum of digits gives 525821928.

It is not an unprimeable number, because it can be changed into a prime (525821927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10954600 + ... + 10954647.

It is an arithmetic number, because the mean of its divisors is an integer number (82159680).

Almost surely, 2^525821928 is an apocalyptic number.

It is an amenable number.

525821928 is an abundant number, since it is smaller than the sum of its proper divisors (788732952).

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

525821928 is a wasteful number, since it uses less digits than its factorization.

525821928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21909256 (or 21909252 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 525821928 is about 22930.8073996534. The cubic root of 525821928 is about 807.1350946734.

The spelling of 525821928 in words is "five hundred twenty-five million, eight hundred twenty-one thousand, nine hundred twenty-eight".