74686440 has 128 divisors (see below), whose sum is σ = 245099520. Its totient is φ = 18124800.

The previous prime is 74686439. The next prime is 74686463. The reversal of 74686440 is 4468647.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62650 + ... + 63830.

It is an arithmetic number, because the mean of its divisors is an integer number (1914840).

Almost surely, 2^74686440 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 74686440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122549760).

74686440 is an abundant number, since it is smaller than the sum of its proper divisors (170413080).

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

74686440 is a wasteful number, since it uses less digits than its factorization.

74686440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 74686440 is about 8642.1316814777. The cubic root of 74686440 is about 421.1278078379.

The spelling of 74686440 in words is "seventy-four million, six hundred eighty-six thousand, four hundred forty".