725841840 has 40 divisors (see below), whose sum is σ = 2250110448. Its totient is φ = 193557760.

The previous prime is 725841803. The next prime is 725841869. The reversal of 725841840 is 48148527.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511931 + ... + 1512410.

Almost surely, 2^725841840 is an apocalyptic number.

It is an amenable number.

725841840 is an abundant number, since it is smaller than the sum of its proper divisors (1524268608).

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

725841840 is a wasteful number, since it uses less digits than its factorization.

725841840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024357 (or 3024351 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 725841840 is about 26941.4520766792. The cubic root of 725841840 is about 898.6984643697.

The spelling of 725841840 in words is "seven hundred twenty-five million, eight hundred forty-one thousand, eight hundred forty".