725525538 has 32 divisors (see below), whose sum is σ = 1521676800. Its totient is φ = 230299776.

The previous prime is 725525527. The next prime is 725525539. The reversal of 725525538 is 835525527.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 725525538.

It is not an unprimeable number, because it can be changed into a prime (725525539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15858 + ... + 41261.

It is an arithmetic number, because the mean of its divisors is an integer number (47552400).

Almost surely, 2^725525538 is an apocalyptic number.

725525538 is an abundant number, since it is smaller than the sum of its proper divisors (796151262).

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

725525538 is a wasteful number, since it uses less digits than its factorization.

725525538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57226.

The product of its digits is 420000, while the sum is 42.

The square root of 725525538 is about 26935.5812634515. The cubic root of 725525538 is about 898.5679026748.

The spelling of 725525538 in words is "seven hundred twenty-five million, five hundred twenty-five thousand, five hundred thirty-eight".