725190840 has 128 divisors (see below), whose sum is σ = 2637100800. Its totient is φ = 175800960.

The previous prime is 725190773. The next prime is 725190853. The reversal of 725190840 is 48091527.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 725190795 and 725190804.

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, 18642 + ... + 42401.

It is an arithmetic number, because the mean of its divisors is an integer number (20602350).

Almost surely, 2^725190840 is an apocalyptic number.

It is an amenable number.

725190840 is an abundant number, since it is smaller than the sum of its proper divisors (1911909960).

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

725190840 is a wasteful number, since it uses less digits than its factorization.

725190840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61074 (or 61064 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 725190840 is about 26929.3676123299. The cubic root of 725190840 is about 898.4297062351.

The spelling of 725190840 in words is "seven hundred twenty-five million, one hundred ninety thousand, eight hundred forty".