398743164 has 18 divisors (see below), whose sum is σ = 1007934200. Its totient is φ = 132914376.

The previous prime is 398743129. The next prime is 398743193. The reversal of 398743164 is 461347893.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×398743164² = 317992221673461792, which 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 5 ways as a sum of consecutive naturals, for example, 5538064 + ... + 5538135.

Almost surely, 2^398743164 is an apocalyptic number.

It is an amenable number.

398743164 is an abundant number, since it is smaller than the sum of its proper divisors (609191036).

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

398743164 is a wasteful number, since it uses less digits than its factorization.

398743164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11076209 (or 11076204 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 398743164 is about 19968.5543793235. The cubic root of 398743164 is about 736.0337861577.

The spelling of 398743164 in words is "three hundred ninety-eight million, seven hundred forty-three thousand, one hundred sixty-four".