74138715 has 36 divisors (see below), whose sum is σ = 149492304. Its totient is φ = 33890976.

The previous prime is 74138711. The next prime is 74138723. The reversal of 74138715 is 51783147.

It is not a de Polignac number, because 74138715 - 2² = 74138711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74138715.

It is not an unprimeable number, because it can be changed into a prime (74138711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14607 + ... + 19016.

It is an arithmetic number, because the mean of its divisors is an integer number (4152564).

Almost surely, 2^74138715 is an apocalyptic number.

74138715 is an abundant number, since it is smaller than the sum of its proper divisors (75353589).

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

74138715 is a wasteful number, since it uses less digits than its factorization.

74138715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33648 (or 33638 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 74138715 is about 8610.3841377723. The cubic root of 74138715 is about 420.0958114749.

The spelling of 74138715 in words is "seventy-four million, one hundred thirty-eight thousand, seven hundred fifteen".