74139136 has 40 divisors (see below), whose sum is σ = 149889960. Its totient is φ = 36630528.

The previous prime is 74139127. The next prime is 74139139. The reversal of 74139136 is 63193147.

It is a super-2 number, since 2×74139136² = 10993222973652992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74139139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44755 + ... + 46381.

It is an arithmetic number, because the mean of its divisors is an integer number (3747249).

Almost surely, 2^74139136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74139136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74944980).

74139136 is an abundant number, since it is smaller than the sum of its proper divisors (75750824).

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

74139136 is an equidigital number, since it uses as much as digits as its factorization.

74139136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734 (or 1718 counting only the distinct ones).

The product of its digits is 13608, while the sum is 34.

The square root of 74139136 is about 8610.4085849627. The cubic root of 74139136 is about 420.0966066510.

The spelling of 74139136 in words is "seventy-four million, one hundred thirty-nine thousand, one hundred thirty-six".