657155328 has 36 divisors (see below), whose sum is σ = 1748993568. Its totient is φ = 219051520.

The previous prime is 657155327. The next prime is 657155351. The reversal of 657155328 is 823551756.

It is a self number, because there is not a number n which added to its sum of digits gives 657155328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657155327) 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, 427068 + ... + 428603.

Almost surely, 2^657155328 is an apocalyptic number.

It is an amenable number.

657155328 is an abundant number, since it is smaller than the sum of its proper divisors (1091838240).

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

657155328 is an equidigital number, since it uses as much as digits as its factorization.

657155328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855690 (or 855676 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The square root of 657155328 is about 25635.0410181064. The cubic root of 657155328 is about 869.4060895694.

The spelling of 657155328 in words is "six hundred fifty-seven million, one hundred fifty-five thousand, three hundred twenty-eight".