74640432 has 90 divisors (see below), whose sum is σ = 204451572. Its totient is φ = 23463552.

The previous prime is 74640431. The next prime is 74640437. The reversal of 74640432 is 23404647.

It is a self number, because there is not a number n which added to its sum of digits gives 74640432.

It is not an unprimeable number, because it can be changed into a prime (74640431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1735803 + ... + 1735845.

Almost surely, 2^74640432 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 74640432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102225786).

74640432 is an abundant number, since it is smaller than the sum of its proper divisors (129811140).

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

74640432 is a wasteful number, since it uses less digits than its factorization.

74640432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 74640432 is about 8639.4694281536. The cubic root of 74640432 is about 421.0413163319.

The spelling of 74640432 in words is "seventy-four million, six hundred forty thousand, four hundred thirty-two".