138842770 has 16 divisors (see below), whose sum is σ = 272636928. Its totient is φ = 50488240.

The previous prime is 138842741. The next prime is 138842779. The reversal of 138842770 is 77248831.

It is not an unprimeable number, because it can be changed into a prime (138842779) 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, 630994 + ... + 631213.

It is an arithmetic number, because the mean of its divisors is an integer number (17039808).

Almost surely, 2^138842770 is an apocalyptic number.

138842770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138842770 is a deficient number, since it is larger than the sum of its proper divisors (133794158).

138842770 is a wasteful number, since it uses less digits than its factorization.

138842770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262225.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 138842770 is about 11783.1561985743. The cubic root of 138842770 is about 517.8147571356.

The spelling of 138842770 in words is "one hundred thirty-eight million, eight hundred forty-two thousand, seven hundred seventy".