138902934 has 16 divisors (see below), whose sum is σ = 289884672. Its totient is φ = 44287848.

The previous prime is 138902899. The next prime is 138902963. The reversal of 138902934 is 439209831.

It is a junction number, because it is equal to n+sod(n) for n = 138902892 and 138902901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503134 + ... + 503409.

It is an arithmetic number, because the mean of its divisors is an integer number (18117792).

Almost surely, 2^138902934 is an apocalyptic number.

138902934 is an abundant number, since it is smaller than the sum of its proper divisors (150981738).

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

138902934 is a wasteful number, since it uses less digits than its factorization.

138902934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006571.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 138902934 is about 11785.7088883105. The cubic root of 138902934 is about 517.8895403076.

The spelling of 138902934 in words is "one hundred thirty-eight million, nine hundred two thousand, nine hundred thirty-four".