74693440 has 28 divisors (see below), whose sum is σ = 177864516. Its totient is φ = 29877248.

The previous prime is 74693429. The next prime is 74693441. The reversal of 74693440 is 4439647.

It can be written as a sum of positive squares in 2 ways, for example, as 43243776 + 31449664 = 6576^2 + 5608^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 74693440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74693441) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 116389 + ... + 117028.

Almost surely, 2^74693440 is an apocalyptic number.

It is an amenable number.

74693440 is an abundant number, since it is smaller than the sum of its proper divisors (103171076).

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

74693440 is a wasteful number, since it uses less digits than its factorization.

74693440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233434 (or 233424 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 74693440 is about 8642.5366646604. The cubic root of 74693440 is about 421.1409641867.

The spelling of 74693440 in words is "seventy-four million, six hundred ninety-three thousand, four hundred forty".