312638642 has 8 divisors (see below), whose sum is σ = 478935936. Its totient is φ = 152993332.

The previous prime is 312638621. The next prime is 312638693. The reversal of 312638642 is 246836213.

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

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, 1662878 + ... + 1663065.

It is an arithmetic number, because the mean of its divisors is an integer number (59866992).

Almost surely, 2^312638642 is an apocalyptic number.

312638642 is a deficient number, since it is larger than the sum of its proper divisors (166297294).

312638642 is a wasteful number, since it uses less digits than its factorization.

312638642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325992.

The product of its digits is 41472, while the sum is 35.

The square root of 312638642 is about 17681.5904827592. The cubic root of 312638642 is about 678.7047445880.

The spelling of 312638642 in words is "three hundred twelve million, six hundred thirty-eight thousand, six hundred forty-two".