138601776 has 20 divisors (see below), whose sum is σ = 358054712. Its totient is φ = 46200576.

The previous prime is 138601717. The next prime is 138601777. The reversal of 138601776 is 677106831.

It is not an unprimeable number, because it can be changed into a prime (138601777) 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, 1443721 + ... + 1443816.

Almost surely, 2^138601776 is an apocalyptic number.

138601776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138601776 is an abundant number, since it is smaller than the sum of its proper divisors (219452936).

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

138601776 is a wasteful number, since it uses less digits than its factorization.

138601776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887548 (or 2887542 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 138601776 is about 11772.9255497519. The cubic root of 138601776 is about 517.5149875470.

The spelling of 138601776 in words is "one hundred thirty-eight million, six hundred one thousand, seven hundred seventy-six".