657423642 has 8 divisors (see below), whose sum is σ = 1314847296. Its totient is φ = 219141212.

The previous prime is 657423629. The next prime is 657423671. The reversal of 657423642 is 246324756.

It is a sphenic number, since it is the product of 3 distinct primes.

657423642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 657423642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54785298 + ... + 54785309.

It is an arithmetic number, because the mean of its divisors is an integer number (164355912).

Almost surely, 2^657423642 is an apocalyptic number.

657423642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

657423642 is a wasteful number, since it uses less digits than its factorization.

657423642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109570612.

The product of its digits is 241920, while the sum is 39.

The square root of 657423642 is about 25640.2738284910. The cubic root of 657423642 is about 869.5243985265.

The spelling of 657423642 in words is "six hundred fifty-seven million, four hundred twenty-three thousand, six hundred forty-two".