74407424 has 80 divisors (see below), whose sum is σ = 183092448. Its totient is φ = 29417472.

The previous prime is 74407393. The next prime is 74407429. The reversal of 74407424 is 42470447.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74407429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45794 + ... + 47390.

Almost surely, 2^74407424 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 74407424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91546224).

74407424 is an abundant number, since it is smaller than the sum of its proper divisors (108685024).

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

74407424 is a wasteful number, since it uses less digits than its factorization.

74407424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 74407424 is about 8625.9738000993. The cubic root of 74407424 is about 420.6027325020.

74407424 divided by its sum of digits (32) gives a palindrome (2325232).

The spelling of 74407424 in words is "seventy-four million, four hundred seven thousand, four hundred twenty-four".