398711178938 has 4 divisors (see below), whose sum is σ = 598066768410. Its totient is φ = 199355589468.

The previous prime is 398711178917. The next prime is 398711178959. The reversal of 398711178938 is 839871117893.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (398711178917) and next prime (398711178959).

It can be written as a sum of positive squares in only one way, i.e., 220790033689 + 177921145249 = 469883^2 + 421807^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99677794733 + ... + 99677794736.

Almost surely, 2^398711178938 is an apocalyptic number.

398711178938 is a deficient number, since it is larger than the sum of its proper divisors (199355589472).

398711178938 is a wasteful number, since it uses less digits than its factorization.

398711178938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199355589471.

The product of its digits is 18289152, while the sum is 65.

The spelling of 398711178938 in words is "three hundred ninety-eight billion, seven hundred eleven million, one hundred seventy-eight thousand, nine hundred thirty-eight".