725223720 has 128 divisors (see below), whose sum is σ = 2350938240. Its totient is φ = 177914880.

The previous prime is 725223679. The next prime is 725223803. The reversal of 725223720 is 27322527.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 618735 + ... + 619905.

It is an arithmetic number, because the mean of its divisors is an integer number (18366705).

Almost surely, 2^725223720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725223720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175469120).

725223720 is an abundant number, since it is smaller than the sum of its proper divisors (1625714520).

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

725223720 is a wasteful number, since it uses less digits than its factorization.

725223720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 725223720 is about 26929.9780913390. The cubic root of 725223720 is about 898.4432842345.

The spelling of 725223720 in words is "seven hundred twenty-five million, two hundred twenty-three thousand, seven hundred twenty".