655044138 has 32 divisors (see below), whose sum is σ = 1663605120. Its totient is φ = 187155360.

The previous prime is 655044107. The next prime is 655044157. The reversal of 655044138 is 831440556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866083 + ... + 866838.

It is an arithmetic number, because the mean of its divisors is an integer number (51987660).

Almost surely, 2^655044138 is an apocalyptic number.

655044138 is an abundant number, since it is smaller than the sum of its proper divisors (1008560982).

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

655044138 is a wasteful number, since it uses less digits than its factorization.

655044138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732939 (or 1732933 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 655044138 is about 25593.8300767978. The cubic root of 655044138 is about 868.4740671350.

The spelling of 655044138 in words is "six hundred fifty-five million, forty-four thousand, one hundred thirty-eight".