399898080 has 96 divisors (see below), whose sum is σ = 1399658400. Its totient is φ = 106638336.

The previous prime is 399898069. The next prime is 399898097. The reversal of 399898080 is 80898993.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-4 number, since 4×399898080⁴ (a number of 36 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41965 + ... + 50604.

It is an arithmetic number, because the mean of its divisors is an integer number (14579775).

Almost surely, 2^399898080 is an apocalyptic number.

399898080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399898080 is an abundant number, since it is smaller than the sum of its proper divisors (999760320).

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

399898080 is a wasteful number, since it uses less digits than its factorization.

399898080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92593 (or 92579 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 399898080 is about 19997.4518376717. The cubic root of 399898080 is about 736.7437149972.

The spelling of 399898080 in words is "three hundred ninety-nine million, eight hundred ninety-eight thousand, eighty".