138948036 has 12 divisors (see below), whose sum is σ = 324212112. Its totient is φ = 46316008.

The previous prime is 138947999. The next prime is 138948041. The reversal of 138948036 is 630849831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5789490 + ... + 5789513.

It is an arithmetic number, because the mean of its divisors is an integer number (27017676).

Almost surely, 2^138948036 is an apocalyptic number.

It is an amenable number.

138948036 is an abundant number, since it is smaller than the sum of its proper divisors (185264076).

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

138948036 is a wasteful number, since it uses less digits than its factorization.

138948036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11579010 (or 11579008 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 138948036 is about 11787.6221520712. The cubic root of 138948036 is about 517.9455874232.

The spelling of 138948036 in words is "one hundred thirty-eight million, nine hundred forty-eight thousand, thirty-six".