138624766 has 16 divisors (see below), whose sum is σ = 251621856. Its totient is φ = 55915776.

The previous prime is 138624677. The next prime is 138624781. The reversal of 138624766 is 667426831.

138624766 = T₃₆₂₃ + T₃₆₂₄ + ... + T₃₆₄₃.

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, 290991 + ... + 291466.

It is an arithmetic number, because the mean of its divisors is an integer number (15726366).

Almost surely, 2^138624766 is an apocalyptic number.

138624766 is a deficient number, since it is larger than the sum of its proper divisors (112997090).

138624766 is a wasteful number, since it uses less digits than its factorization.

138624766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582483.

The product of its digits is 290304, while the sum is 43.

The square root of 138624766 is about 11773.9019020884. The cubic root of 138624766 is about 517.5435995223.

The spelling of 138624766 in words is "one hundred thirty-eight million, six hundred twenty-four thousand, seven hundred sixty-six".