392221998 has 24 divisors (see below), whose sum is σ = 971216688. Its totient is φ = 112063392.

The previous prime is 392221987. The next prime is 392222041. The reversal of 392221998 is 899122293.

It is a happy number.

It is a super-2 number, since 2×392221998² = 307676191430224008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1556311 + ... + 1556562.

It is an arithmetic number, because the mean of its divisors is an integer number (40467362).

Almost surely, 2^392221998 is an apocalyptic number.

392221998 is an abundant number, since it is smaller than the sum of its proper divisors (578994690).

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

392221998 is a wasteful number, since it uses less digits than its factorization.

392221998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112888 (or 3112885 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 392221998 is about 19804.5953758212. The cubic root of 392221998 is about 731.9992721483. Note that the first 3 decimals are identical.

The spelling of 392221998 in words is "three hundred ninety-two million, two hundred twenty-one thousand, nine hundred ninety-eight".