138782764 has 48 divisors (see below), whose sum is σ = 272764800. Its totient is φ = 61399296.

The previous prime is 138782737. The next prime is 138782803. The reversal of 138782764 is 467287831.

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, 210267 + ... + 210925.

It is an arithmetic number, because the mean of its divisors is an integer number (5682600).

Almost surely, 2^138782764 is an apocalyptic number.

It is an amenable number.

138782764 is a deficient number, since it is larger than the sum of its proper divisors (133982036).

138782764 is a wasteful number, since it uses less digits than its factorization.

138782764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 860 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 138782764 is about 11780.6096616432. The cubic root of 138782764 is about 517.7401488342.

The spelling of 138782764 in words is "one hundred thirty-eight million, seven hundred eighty-two thousand, seven hundred sixty-four".