138724862 has 8 divisors (see below), whose sum is σ = 220327776. Its totient is φ = 65282272.

The previous prime is 138724847. The next prime is 138724867. The reversal of 138724862 is 268427831.

138724862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138724867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040038 + ... + 2040105.

It is an arithmetic number, because the mean of its divisors is an integer number (27540972).

Almost surely, 2^138724862 is an apocalyptic number.

138724862 is a deficient number, since it is larger than the sum of its proper divisors (81602914).

138724862 is a wasteful number, since it uses less digits than its factorization.

138724862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080162.

The product of its digits is 129024, while the sum is 41.

The square root of 138724862 is about 11778.1518923811. The cubic root of 138724862 is about 517.6681361450.

The spelling of 138724862 in words is "one hundred thirty-eight million, seven hundred twenty-four thousand, eight hundred sixty-two".