138775404 has 12 divisors (see below), whose sum is σ = 323809304. Its totient is φ = 46258464.

The previous prime is 138775397. The next prime is 138775451. The reversal of 138775404 is 404577831.

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

It is a super-2 number, since 2×138775404² = 38517225510726432, which 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, 5782297 + ... + 5782320.

Almost surely, 2^138775404 is an apocalyptic number.

It is an amenable number.

138775404 is an abundant number, since it is smaller than the sum of its proper divisors (185033900).

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

138775404 is a wasteful number, since it uses less digits than its factorization.

138775404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11564624 (or 11564622 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 138775404 is about 11780.2972797803. The cubic root of 138775404 is about 517.7309963171.

The spelling of 138775404 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, four hundred four".