138652658 has 8 divisors (see below), whose sum is σ = 208262640. Its totient is φ = 69231780.

The previous prime is 138652649. The next prime is 138652691. The reversal of 138652658 is 856256831.

138652658 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45428 + ... + 48383.

It is an arithmetic number, because the mean of its divisors is an integer number (26032830).

Almost surely, 2^138652658 is an apocalyptic number.

138652658 is a deficient number, since it is larger than the sum of its proper divisors (69609982).

138652658 is an equidigital number, since it uses as much as digits as its factorization.

138652658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94552.

The product of its digits is 345600, while the sum is 44.

The square root of 138652658 is about 11775.0863266475. The cubic root of 138652658 is about 517.5783079862.

The spelling of 138652658 in words is "one hundred thirty-eight million, six hundred fifty-two thousand, six hundred fifty-eight".