399055903998 has 32 divisors (see below), whose sum is σ = 802807068672. Its totient is φ = 132236248800.

The previous prime is 399055903979. The next prime is 399055904021. The reversal of 399055903998 is 899309550993.

It is a super-2 number, since 2×399055903998² (a number of 24 digits) 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 15 ways as a sum of consecutive naturals, for example, 19951783 + ... + 19971773.

It is an arithmetic number, because the mean of its divisors is an integer number (25087720896).

Almost surely, 2^399055903998 is an apocalyptic number.

399055903998 is an abundant number, since it is smaller than the sum of its proper divisors (403751164674).

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

399055903998 is a wasteful number, since it uses less digits than its factorization.

399055903998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39400.

The product of its (nonzero) digits is 106288200, while the sum is 69.

The spelling of 399055903998 in words is "three hundred ninety-nine billion, fifty-five million, nine hundred three thousand, nine hundred ninety-eight".