138889004 has 24 divisors (see below), whose sum is σ = 252428400. Its totient is φ = 66785600.

The previous prime is 138889001. The next prime is 138889007. The reversal of 138889004 is 400988831.

It is an interprime number because it is at equal distance from previous prime (138889001) and next prime (138889007).

It is a super-2 number, since 2×138889004² = 38580310864224032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138889001) 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, 28979 + ... + 33429.

It is an arithmetic number, because the mean of its divisors is an integer number (10517850).

Almost surely, 2^138889004 is an apocalyptic number.

It is an amenable number.

138889004 is a deficient number, since it is larger than the sum of its proper divisors (113539396).

138889004 is a wasteful number, since it uses less digits than its factorization.

138889004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4753 (or 4751 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 138889004 is about 11785.1179035256. The cubic root of 138889004 is about 517.8722273964.

The spelling of 138889004 in words is "one hundred thirty-eight million, eight hundred eighty-nine thousand, four".