74912440 has 64 divisors (see below), whose sum is σ = 178596000. Its totient is φ = 28200960.

The previous prime is 74912437. The next prime is 74912443. The reversal of 74912440 is 4421947.

It is an interprime number because it is at equal distance from previous prime (74912437) and next prime (74912443).

It is a super-2 number, since 2×74912440² = 11223747333507200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74912443) 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 15 ways as a sum of consecutive naturals, for example, 182956 + ... + 183364.

Almost surely, 2^74912440 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 74912440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89298000).

74912440 is an abundant number, since it is smaller than the sum of its proper divisors (103683560).

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

74912440 is a wasteful number, since it uses less digits than its factorization.

74912440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 74912440 is about 8655.1972825580. The cubic root of 74912440 is about 421.5521554901.

The spelling of 74912440 in words is "seventy-four million, nine hundred twelve thousand, four hundred forty".