492908638 has 4 divisors (see below), whose sum is σ = 739362960. Its totient is φ = 246454318.

The previous prime is 492908623. The next prime is 492908657. The reversal of 492908638 is 836809294.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 492908591 and 492908600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123227158 + ... + 123227161.

It is an arithmetic number, because the mean of its divisors is an integer number (184840740).

Almost surely, 2^492908638 is an apocalyptic number.

492908638 is a deficient number, since it is larger than the sum of its proper divisors (246454322).

492908638 is a wasteful number, since it uses less digits than its factorization.

492908638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246454321.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 492908638 is about 22201.5458470801. The cubic root of 492908638 is about 789.9303672002.

The spelling of 492908638 in words is "four hundred ninety-two million, nine hundred eight thousand, six hundred thirty-eight".