657948136 has 16 divisors (see below), whose sum is σ = 1245183840. Its totient is φ = 325899120.

The previous prime is 657948133. The next prime is 657948139. The reversal of 657948136 is 631849756.

It is an interprime number because it is at equal distance from previous prime (657948133) and next prime (657948139).

It is a self number, because there is not a number n which added to its sum of digits gives 657948136.

It is not an unprimeable number, because it can be changed into a prime (657948133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383460 + ... + 385171.

It is an arithmetic number, because the mean of its divisors is an integer number (77823990).

Almost surely, 2^657948136 is an apocalyptic number.

It is an amenable number.

657948136 is a deficient number, since it is larger than the sum of its proper divisors (587235704).

657948136 is a wasteful number, since it uses less digits than its factorization.

657948136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768744 (or 768740 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 657948136 is about 25650.4997222276. The cubic root of 657948136 is about 869.7555732072.

The spelling of 657948136 in words is "six hundred fifty-seven million, nine hundred forty-eight thousand, one hundred thirty-six".