138455650 has 24 divisors (see below), whose sum is σ = 272677860. Its totient is φ = 52124160.

The previous prime is 138455627. The next prime is 138455651. The reversal of 138455650 is 56554831.

It can be written as a sum of positive squares in 6 ways, for example, as 55845729 + 82609921 = 7473^2 + 9089^2 .

It is not an unprimeable number, because it can be changed into a prime (138455651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80595 + ... + 82294.

Almost surely, 2^138455650 is an apocalyptic number.

138455650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138455650 is a deficient number, since it is larger than the sum of its proper divisors (134222210).

138455650 is a wasteful number, since it uses less digits than its factorization.

138455650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162918 (or 162913 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 138455650 is about 11766.7178941283. The cubic root of 138455650 is about 517.3330538837. Note that the first 3 decimals are identical.

The spelling of 138455650 in words is "one hundred thirty-eight million, four hundred fifty-five thousand, six hundred fifty".