74439680 has 176 divisors, whose sum is σ = 213805056. Its totient is φ = 24330240.

The previous prime is 74439679. The next prime is 74439683. The reversal of 74439680 is 8693447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74439683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111007 + ... + 1111073.

Almost surely, 2^74439680 is an apocalyptic number.

74439680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74439680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106902528).

74439680 is an abundant number, since it is smaller than the sum of its proper divisors (139365376).

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

74439680 is a wasteful number, since it uses less digits than its factorization.

74439680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 74439680 is about 8627.8432994579. The cubic root of 74439680 is about 420.6635015357.

The spelling of 74439680 in words is "seventy-four million, four hundred thirty-nine thousand, six hundred eighty".