725281040 has 40 divisors (see below), whose sum is σ = 1839578688. Its totient is φ = 263738240.

The previous prime is 725281027. The next prime is 725281049. The reversal of 725281040 is 40182527.

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

It is a junction number, because it is equal to n+sod(n) for n = 725280994 and 725281012.

It is not an unprimeable number, because it can be changed into a prime (725281049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411212 + ... + 412971.

Almost surely, 2^725281040 is an apocalyptic number.

It is an amenable number.

725281040 is an abundant number, since it is smaller than the sum of its proper divisors (1114297648).

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

725281040 is a wasteful number, since it uses less digits than its factorization.

725281040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824207 (or 824201 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 725281040 is about 26931.0423118007. The cubic root of 725281040 is about 898.4669539017.

The spelling of 725281040 in words is "seven hundred twenty-five million, two hundred eighty-one thousand, forty".