138658234 has 32 divisors (see below), whose sum is σ = 245387520. Its totient is φ = 57931200.

The previous prime is 138658231. The next prime is 138658241. The reversal of 138658234 is 432856831.

It is a super-2 number, since 2×138658234² = 38452211711997512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138658231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76612 + ... + 78400.

It is an arithmetic number, because the mean of its divisors is an integer number (7668360).

Almost surely, 2^138658234 is an apocalyptic number.

138658234 is a deficient number, since it is larger than the sum of its proper divisors (106729286).

138658234 is a wasteful number, since it uses less digits than its factorization.

138658234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086.

The product of its digits is 138240, while the sum is 40.

The square root of 138658234 is about 11775.3230953550. The cubic root of 138658234 is about 517.5852461341.

The spelling of 138658234 in words is "one hundred thirty-eight million, six hundred fifty-eight thousand, two hundred thirty-four".