725455540 has 12 divisors (see below), whose sum is σ = 1523456676. Its totient is φ = 290182208.

The previous prime is 725455487. The next prime is 725455543. The reversal of 725455540 is 45554527.

It can be written as a sum of positive squares in 2 ways, for example, as 220284964 + 505170576 = 14842^2 + 22476^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 725455540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725455543) 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, 18136369 + ... + 18136408.

It is an arithmetic number, because the mean of its divisors is an integer number (126954723).

Almost surely, 2^725455540 is an apocalyptic number.

It is an amenable number.

725455540 is an abundant number, since it is smaller than the sum of its proper divisors (798001136).

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

725455540 is a wasteful number, since it uses less digits than its factorization.

725455540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36272786 (or 36272784 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 37.

The square root of 725455540 is about 26934.2818727361. The cubic root of 725455540 is about 898.5390040922.

The spelling of 725455540 in words is "seven hundred twenty-five million, four hundred fifty-five thousand, five hundred forty".