725403616 has 24 divisors (see below), whose sum is σ = 1632158640. Its totient is φ = 310887168.

The previous prime is 725403607. The next prime is 725403619. The reversal of 725403616 is 616304527.

It is a happy number.

It is a super-2 number, since 2×725403616² = 1052420812211750912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725403619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618981 + ... + 1619428.

It is an arithmetic number, because the mean of its divisors is an integer number (68006610).

Almost surely, 2^725403616 is an apocalyptic number.

It is an amenable number.

725403616 is an abundant number, since it is smaller than the sum of its proper divisors (906755024).

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

725403616 is a wasteful number, since it uses less digits than its factorization.

725403616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238426 (or 3238418 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 725403616 is about 26933.3179537910. The cubic root of 725403616 is about 898.5175661360.

The spelling of 725403616 in words is "seven hundred twenty-five million, four hundred three thousand, six hundred sixteen".