399333870 has 48 divisors (see below), whose sum is σ = 1118138112. Its totient is φ = 98297280.

The previous prime is 399333839. The next prime is 399333881. The reversal of 399333870 is 78333993.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169486 + ... + 171825.

It is an arithmetic number, because the mean of its divisors is an integer number (23294544).

Almost surely, 2^399333870 is an apocalyptic number.

399333870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399333870 is an abundant number, since it is smaller than the sum of its proper divisors (718804242).

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

399333870 is a wasteful number, since it uses less digits than its factorization.

399333870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341337 (or 341334 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 399333870 is about 19983.3398109525. The cubic root of 399333870 is about 736.3970651574.

The spelling of 399333870 in words is "three hundred ninety-nine million, three hundred thirty-three thousand, eight hundred seventy".