138707634 has 16 divisors (see below), whose sum is σ = 298755072. Its totient is φ = 42679248.

The previous prime is 138707629. The next prime is 138707693. The reversal of 138707634 is 436707831.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 138707592 and 138707601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889074 + ... + 889229.

It is an arithmetic number, because the mean of its divisors is an integer number (18672192).

Almost surely, 2^138707634 is an apocalyptic number.

138707634 is an abundant number, since it is smaller than the sum of its proper divisors (160047438).

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

138707634 is a wasteful number, since it uses less digits than its factorization.

138707634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778321.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 138707634 is about 11777.4205155458. The cubic root of 138707634 is about 517.6467058219.

The spelling of 138707634 in words is "one hundred thirty-eight million, seven hundred seven thousand, six hundred thirty-four".