138604554 has 32 divisors (see below), whose sum is σ = 336012480. Its totient is φ = 42001200.

The previous prime is 138604549. The next prime is 138604573. The reversal of 138604554 is 455406831.

It is a happy number.

It is a super-2 number, since 2×138604554² = 38422444779077832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116077 + ... + 117264.

It is an arithmetic number, because the mean of its divisors is an integer number (10500390).

Almost surely, 2^138604554 is an apocalyptic number.

138604554 is an abundant number, since it is smaller than the sum of its proper divisors (197407926).

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

138604554 is a wasteful number, since it uses less digits than its factorization.

138604554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233363 (or 233357 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 138604554 is about 11773.0435317296. The cubic root of 138604554 is about 517.5184450472.

The spelling of 138604554 in words is "one hundred thirty-eight million, six hundred four thousand, five hundred fifty-four".