138709024 has 12 divisors (see below), whose sum is σ = 273083454. Its totient is φ = 69354496.

The previous prime is 138709009. The next prime is 138709049. The reversal of 138709024 is 420907831.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 65092624 = 8580^2 + 8068^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2167297 + ... + 2167360.

Almost surely, 2^138709024 is an apocalyptic number.

It is an amenable number.

138709024 is a deficient number, since it is larger than the sum of its proper divisors (134374430).

138709024 is an equidigital number, since it uses as much as digits as its factorization.

138709024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334667 (or 4334659 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 138709024 is about 11777.4795266220. The cubic root of 138709024 is about 517.6484349421.

The spelling of 138709024 in words is "one hundred thirty-eight million, seven hundred nine thousand, twenty-four".