392890642 has 8 divisors (see below), whose sum is σ = 605264076. Its totient is φ = 191135952.

The previous prime is 392890633. The next prime is 392890657. The reversal of 392890642 is 246098293.

It can be written as a sum of positive squares in 2 ways, for example, as 288626121 + 104264521 = 16989^2 + 10211^2 .

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

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, 2654593 + ... + 2654740.

Almost surely, 2^392890642 is an apocalyptic number.

392890642 is a deficient number, since it is larger than the sum of its proper divisors (212373434).

392890642 is a wasteful number, since it uses less digits than its factorization.

392890642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5309372.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 392890642 is about 19821.4692190059. The cubic root of 392890642 is about 732.4149967951.

The spelling of 392890642 in words is "three hundred ninety-two million, eight hundred ninety thousand, six hundred forty-two".