398877632439 has 160 divisors (see below), whose sum is σ = 654548428800. Its totient is φ = 214653457920.

The previous prime is 398877632401. The next prime is 398877632459. The reversal of 398877632439 is 934236778893.

It is not a de Polignac number, because 398877632439 - 2²⁰ = 398876583863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398877632459) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2388488734 + ... + 2388488900.

It is an arithmetic number, because the mean of its divisors is an integer number (4090927680).

Almost surely, 2^398877632439 is an apocalyptic number.

398877632439 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

398877632439 is a deficient number, since it is larger than the sum of its proper divisors (255670796361).

398877632439 is a wasteful number, since it uses less digits than its factorization.

398877632439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 330 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 69.

The spelling of 398877632439 in words is "three hundred ninety-eight billion, eight hundred seventy-seven million, six hundred thirty-two thousand, four hundred thirty-nine".