492178906 has 4 divisors (see below), whose sum is σ = 738268362. Its totient is φ = 246089452.

The previous prime is 492178879. The next prime is 492178919. The reversal of 492178906 is 609871294.

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

It can be written as a sum of positive squares in only one way, i.e., 388444681 + 103734225 = 19709^2 + 10185^2 .

It is a super-2 number, since 2×492178906² = 484480151022713672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123044725 + ... + 123044728.

Almost surely, 2^492178906 is an apocalyptic number.

492178906 is a deficient number, since it is larger than the sum of its proper divisors (246089456).

492178906 is a wasteful number, since it uses less digits than its factorization.

492178906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246089455.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 492178906 is about 22185.1054989603. The cubic root of 492178906 is about 789.5403543115.

The spelling of 492178906 in words is "four hundred ninety-two million, one hundred seventy-eight thousand, nine hundred six".