399376992 has 48 divisors (see below), whose sum is σ = 1198132992. Its totient is φ = 114107520.

The previous prime is 399376963. The next prime is 399376997. The reversal of 399376992 is 299673993.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399376997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296484 + ... + 297827.

It is an arithmetic number, because the mean of its divisors is an integer number (24961104).

Almost surely, 2^399376992 is an apocalyptic number.

399376992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399376992 is an abundant number, since it is smaller than the sum of its proper divisors (798756000).

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

399376992 is a wasteful number, since it uses less digits than its factorization.

399376992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594331 (or 594323 counting only the distinct ones).

The product of its digits is 4960116, while the sum is 57.

The square root of 399376992 is about 19984.4187306011. The cubic root of 399376992 is about 736.4235707739.

The spelling of 399376992 in words is "three hundred ninety-nine million, three hundred seventy-six thousand, nine hundred ninety-two".