398878162036 has 12 divisors (see below), whose sum is σ = 698064593380. Its totient is φ = 199431135360.

The previous prime is 398878162031. The next prime is 398878162057. The reversal of 398878162036 is 630261878893.

It can be written as a sum of positive squares in 2 ways, for example, as 107612865936 + 291265296100 = 328044^2 + 539690^2 .

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398878162031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872741 + ... + 2074828.

Almost surely, 2^398878162036 is an apocalyptic number.

It is an amenable number.

398878162036 is a deficient number, since it is larger than the sum of its proper divisors (299186431344).

398878162036 is a wasteful number, since it uses less digits than its factorization.

398878162036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972834 (or 3972832 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 398878162036 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, one hundred sixty-two thousand, thirty-six".