138704424 has 32 divisors (see below), whose sum is σ = 347136000. Its totient is φ = 46184832.

The previous prime is 138704407. The next prime is 138704429. The reversal of 138704424 is 424407831.

It is not an unprimeable number, because it can be changed into a prime (138704429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24537 + ... + 29655.

It is an arithmetic number, because the mean of its divisors is an integer number (10848000).

Almost surely, 2^138704424 is an apocalyptic number.

It is an amenable number.

138704424 is an abundant number, since it is smaller than the sum of its proper divisors (208431576).

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

138704424 is a wasteful number, since it uses less digits than its factorization.

138704424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257 (or 6253 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 138704424 is about 11777.2842370387. The cubic root of 138704424 is about 517.6427126296.

It can be divided in two parts, 138704 and 424, that added together give a triangular number (139128 = T₅₂₇).

The spelling of 138704424 in words is "one hundred thirty-eight million, seven hundred four thousand, four hundred twenty-four".