138472926 has 32 divisors (see below), whose sum is σ = 291299328. Its totient is φ = 43797600.

The previous prime is 138472921. The next prime is 138472927. The reversal of 138472926 is 629274831.

138472926 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138472921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13576 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (9103104).

Almost surely, 2^138472926 is an apocalyptic number.

138472926 is an abundant number, since it is smaller than the sum of its proper divisors (152826402).

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

138472926 is a wasteful number, since it uses less digits than its factorization.

138472926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8056.

The product of its digits is 145152, while the sum is 42.

The square root of 138472926 is about 11767.4519756828. The cubic root of 138472926 is about 517.3545699772.

The spelling of 138472926 in words is "one hundred thirty-eight million, four hundred seventy-two thousand, nine hundred twenty-six".