138678088 has 16 divisors (see below), whose sum is σ = 260550000. Its totient is φ = 69198096.

The previous prime is 138678079. The next prime is 138678091. The reversal of 138678088 is 880876831.

It is a super-2 number, since 2×138678088² = 38463224182671488, 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, 13378 + ... + 21361.

It is an arithmetic number, because the mean of its divisors is an integer number (16284375).

Almost surely, 2^138678088 is an apocalyptic number.

It is an amenable number.

138678088 is a deficient number, since it is larger than the sum of its proper divisors (121871912).

138678088 is a wasteful number, since it uses less digits than its factorization.

138678088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35244 (or 35240 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 138678088 is about 11776.1660993721. The cubic root of 138678088 is about 517.6099487110.

The spelling of 138678088 in words is "one hundred thirty-eight million, six hundred seventy-eight thousand, eighty-eight".