338778564 has 12 divisors (see below), whose sum is σ = 790483344. Its totient is φ = 112926184.

The previous prime is 338778563. The next prime is 338778577. The reversal of 338778564 is 465877833.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×338778564² = 229541830851804192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (338778563) 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, 14115762 + ... + 14115785.

It is an arithmetic number, because the mean of its divisors is an integer number (65873612).

Almost surely, 2^338778564 is an apocalyptic number.

It is an amenable number.

338778564 is an abundant number, since it is smaller than the sum of its proper divisors (451704780).

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

338778564 is a wasteful number, since it uses less digits than its factorization.

338778564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28231554 (or 28231552 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 51.

The square root of 338778564 is about 18405.9382808918. The cubic root of 338778564 is about 697.1164124594.

The spelling of 338778564 in words is "three hundred thirty-eight million, seven hundred seventy-eight thousand, five hundred sixty-four".