138762650 has 24 divisors (see below), whose sum is σ = 277953564. Its totient is φ = 51235200.

The previous prime is 138762649. The next prime is 138762661. The reversal of 138762650 is 56267831.

It can be written as a sum of positive squares in 6 ways, for example, as 35557369 + 103205281 = 5963^2 + 10159^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106091 + ... + 107390.

Almost surely, 2^138762650 is an apocalyptic number.

138762650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138762650 is an abundant number, since it is smaller than the sum of its proper divisors (139190914).

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

138762650 is a wasteful number, since it uses less digits than its factorization.

138762650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213506 (or 213501 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 138762650 is about 11779.7559397468. The cubic root of 138762650 is about 517.7151353330.

The spelling of 138762650 in words is "one hundred thirty-eight million, seven hundred sixty-two thousand, six hundred fifty".