525306390 has 64 divisors (see below), whose sum is σ = 1479803904. Its totient is φ = 116823168.

The previous prime is 525306389. The next prime is 525306403. The reversal of 525306390 is 93603525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26034 + ... + 41573.

It is an arithmetic number, because the mean of its divisors is an integer number (23121936).

Almost surely, 2^525306390 is an apocalyptic number.

525306390 is an abundant number, since it is smaller than the sum of its proper divisors (954497514).

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

525306390 is a wasteful number, since it uses less digits than its factorization.

525306390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67661.

The product of its (nonzero) digits is 24300, while the sum is 33.

The square root of 525306390 is about 22919.5634775185. The cubic root of 525306390 is about 806.8712253198.

The spelling of 525306390 in words is "five hundred twenty-five million, three hundred six thousand, three hundred ninety".