138893004 has 36 divisors (see below), whose sum is σ = 352357096. Its totient is φ = 46130688.

The previous prime is 138893003. The next prime is 138893011. The reversal of 138893004 is 400398831.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 138893004.

It is not an unprimeable number, because it can be changed into a prime (138893003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3372 + ... + 17004.

Almost surely, 2^138893004 is an apocalyptic number.

It is an amenable number.

138893004 is an abundant number, since it is smaller than the sum of its proper divisors (213464092).

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

138893004 is a wasteful number, since it uses less digits than its factorization.

138893004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13926 (or 13921 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 138893004 is about 11785.2876078609. The cubic root of 138893004 is about 517.8771989179.

The spelling of 138893004 in words is "one hundred thirty-eight million, eight hundred ninety-three thousand, four".