74678172 has 12 divisors (see below), whose sum is σ = 174249096. Its totient is φ = 24892720.

The previous prime is 74678141. The next prime is 74678203. The reversal of 74678172 is 27187647.

It is an interprime number because it is at equal distance from previous prime (74678141) and next prime (74678203).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×74678172³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111579 + ... + 3111602.

It is an arithmetic number, because the mean of its divisors is an integer number (14520758).

Almost surely, 2^74678172 is an apocalyptic number.

It is an amenable number.

74678172 is an abundant number, since it is smaller than the sum of its proper divisors (99570924).

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

74678172 is a wasteful number, since it uses less digits than its factorization.

74678172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223188 (or 6223186 counting only the distinct ones).

The product of its digits is 131712, while the sum is 42.

The square root of 74678172 is about 8641.6533140366. The cubic root of 74678172 is about 421.1122672516.

The spelling of 74678172 in words is "seventy-four million, six hundred seventy-eight thousand, one hundred seventy-two".