74638156 has 18 divisors (see below), whose sum is σ = 137630220. Its totient is φ = 35319240.

The previous prime is 74638133. The next prime is 74638169. The reversal of 74638156 is 65183647.

It is a happy number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 74821 + ... + 75811.

Almost surely, 2^74638156 is an apocalyptic number.

74638156 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

74638156 is a deficient number, since it is larger than the sum of its proper divisors (62992064).

74638156 is an equidigital number, since it uses as much as digits as its factorization.

74638156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005 (or 1012 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 74638156 is about 8639.3377060976. The cubic root of 74638156 is about 421.0370367042.

The spelling of 74638156 in words is "seventy-four million, six hundred thirty-eight thousand, one hundred fifty-six".