74172384 has 144 divisors (see below), whose sum is σ = 247940784. Its totient is φ = 20736000.

The previous prime is 74172361. The next prime is 74172391. The reversal of 74172384 is 48327147.

It is a happy number.

74172384 is a `hidden beast` number, since 7 + 417 + 238 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40284 + ... + 42084.

It is an arithmetic number, because the mean of its divisors is an integer number (1721811).

Almost surely, 2^74172384 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 74172384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123970392).

74172384 is an abundant number, since it is smaller than the sum of its proper divisors (173768400).

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

74172384 is a wasteful number, since it uses less digits than its factorization.

74172384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1830 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 74172384 is about 8612.3390551000. The cubic root of 74172384 is about 420.1593952821.

It can be divided in two parts, 7417 and 2384, that added together give a square (9801 = 99²).

The spelling of 74172384 in words is "seventy-four million, one hundred seventy-two thousand, three hundred eighty-four".