138774568 has 32 divisors (see below), whose sum is σ = 268018560. Its totient is φ = 67314240.

The previous prime is 138774563. The next prime is 138774611. The reversal of 138774568 is 865477831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138774563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186405 + ... + 187147.

It is an arithmetic number, because the mean of its divisors is an integer number (8375580).

Almost surely, 2^138774568 is an apocalyptic number.

It is an amenable number.

138774568 is a deficient number, since it is larger than the sum of its proper divisors (129243992).

138774568 is a wasteful number, since it uses less digits than its factorization.

138774568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1413 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 138774568 is about 11780.2617967514. The cubic root of 138774568 is about 517.7299566901.

The spelling of 138774568 in words is "one hundred thirty-eight million, seven hundred seventy-four thousand, five hundred sixty-eight".