138306722 has 16 divisors (see below), whose sum is σ = 213062400. Its totient is φ = 67310880.

The previous prime is 138306709. The next prime is 138306737. The reversal of 138306722 is 227603831.

It is a happy 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, 5054 + ... + 17382.

It is an arithmetic number, because the mean of its divisors is an integer number (13316400).

Almost surely, 2^138306722 is an apocalyptic number.

138306722 is a deficient number, since it is larger than the sum of its proper divisors (74755678).

138306722 is a wasteful number, since it uses less digits than its factorization.

138306722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12481.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 138306722 is about 11760.3878337409. The cubic root of 138306722 is about 517.1474998384.

The spelling of 138306722 in words is "one hundred thirty-eight million, three hundred six thousand, seven hundred twenty-two".