138646004 has 12 divisors (see below), whose sum is σ = 277292064. Its totient is φ = 59419704.

The previous prime is 138646003. The next prime is 138646009. The reversal of 138646004 is 400646831.

138646004 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138646003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2475794 + ... + 2475849.

It is an arithmetic number, because the mean of its divisors is an integer number (23107672).

Almost surely, 2^138646004 is an apocalyptic number.

138646004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138646004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138646004 is a wasteful number, since it uses less digits than its factorization.

138646004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951654 (or 4951652 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 138646004 is about 11774.8037775582. The cubic root of 138646004 is about 517.5700282527.

The spelling of 138646004 in words is "one hundred thirty-eight million, six hundred forty-six thousand, four".