138845958 has 16 divisors (see below), whose sum is σ = 292307520. Its totient is φ = 43846056.

The previous prime is 138845951. The next prime is 138845981. The reversal of 138845958 is 859548831.

It is a self number, because there is not a number n which added to its sum of digits gives 138845958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138845951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608860 + ... + 609087.

It is an arithmetic number, because the mean of its divisors is an integer number (18269220).

Almost surely, 2^138845958 is an apocalyptic number.

138845958 is an abundant number, since it is smaller than the sum of its proper divisors (153461562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138845958 is a wasteful number, since it uses less digits than its factorization.

138845958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217971.

The product of its digits is 1382400, while the sum is 51.

The square root of 138845958 is about 11783.2914756447. The cubic root of 138845958 is about 517.8187203256.

The spelling of 138845958 in words is "one hundred thirty-eight million, eight hundred forty-five thousand, nine hundred fifty-eight".