657242384 has 20 divisors (see below), whose sum is σ = 1277066700. Its totient is φ = 327676800.

The previous prime is 657242371. The next prime is 657242413. The reversal of 657242384 is 483242756.

It can be written as a sum of positive squares in 2 ways, for example, as 512569600 + 144672784 = 22640^2 + 12028^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53267 + ... + 64434.

It is an arithmetic number, because the mean of its divisors is an integer number (63853335).

Almost surely, 2^657242384 is an apocalyptic number.

It is an amenable number.

657242384 is a deficient number, since it is larger than the sum of its proper divisors (619824316).

657242384 is a wasteful number, since it uses less digits than its factorization.

657242384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118058 (or 118052 counting only the distinct ones).

The product of its digits is 322560, while the sum is 41.

The square root of 657242384 is about 25636.7389501863. The cubic root of 657242384 is about 869.4444791106. Note that the first 4 decimals are identical.

The spelling of 657242384 in words is "six hundred fifty-seven million, two hundred forty-two thousand, three hundred eighty-four".