138809696 has 24 divisors (see below), whose sum is σ = 275376024. Its totient is φ = 68872960.

The previous prime is 138809683. The next prime is 138809707. The reversal of 138809696 is 696908831.

It is a super-2 number, since 2×138809696² = 38536263407224832, 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 3 ways as a sum of consecutive naturals, for example, 12365 + ... + 20748.

It is an arithmetic number, because the mean of its divisors is an integer number (11474001).

Almost surely, 2^138809696 is an apocalyptic number.

138809696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138809696 is a deficient number, since it is larger than the sum of its proper divisors (136566328).

138809696 is a wasteful number, since it uses less digits than its factorization.

138809696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33254 (or 33246 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 138809696 is about 11781.7526709739. The cubic root of 138809696 is about 517.7736373247.

The spelling of 138809696 in words is "one hundred thirty-eight million, eight hundred nine thousand, six hundred ninety-six".