138724886 has 8 divisors (see below), whose sum is σ = 209413200. Its totient is φ = 68920488.

The previous prime is 138724867. The next prime is 138724897. The reversal of 138724886 is 688427831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138724886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220586 + ... + 221213.

It is an arithmetic number, because the mean of its divisors is an integer number (26176650).

Almost surely, 2^138724886 is an apocalyptic number.

138724886 is a deficient number, since it is larger than the sum of its proper divisors (70688314).

138724886 is a wasteful number, since it uses less digits than its factorization.

138724886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441958.

The product of its digits is 516096, while the sum is 47.

The square root of 138724886 is about 11778.1529112166. The cubic root of 138724886 is about 517.6681659979.

The spelling of 138724886 in words is "one hundred thirty-eight million, seven hundred twenty-four thousand, eight hundred eighty-six".