398878097434 has 8 divisors (see below), whose sum is σ = 598413714228. Its totient is φ = 199406859360.

The previous prime is 398878097419. The next prime is 398878097441. The reversal of 398878097434 is 434790878893.

It can be written as a sum of positive squares in 2 ways, for example, as 398836456225 + 41641209 = 631535^2 + 6453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×398878097434² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16079187 + ... + 16103974.

Almost surely, 2^398878097434 is an apocalyptic number.

398878097434 is a deficient number, since it is larger than the sum of its proper divisors (199535616794).

398878097434 is a wasteful number, since it uses less digits than its factorization.

398878097434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32189360.

The product of its (nonzero) digits is 292626432, while the sum is 70.

The spelling of 398878097434 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, ninety-seven thousand, four hundred thirty-four".