138733026 has 16 divisors (see below), whose sum is σ = 278524224. Its totient is φ = 46067984.

The previous prime is 138732991. The next prime is 138733043. The reversal of 138733026 is 620337831.

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, 42381 + ... + 45536.

It is an arithmetic number, because the mean of its divisors is an integer number (17407764).

Almost surely, 2^138733026 is an apocalyptic number.

138733026 is an abundant number, since it is smaller than the sum of its proper divisors (139791198).

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

138733026 is a wasteful number, since it uses less digits than its factorization.

138733026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88185.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 138733026 is about 11778.4984611792. The cubic root of 138733026 is about 517.6782909211.

The spelling of 138733026 in words is "one hundred thirty-eight million, seven hundred thirty-three thousand, twenty-six".