74909680 has 80 divisors (see below), whose sum is σ = 179702784. Its totient is φ = 29030400.

The previous prime is 74909651. The next prime is 74909683. The reversal of 74909680 is 8690947.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×74909680² = 11222920315404800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74909683) 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, 589777 + ... + 589903.

Almost surely, 2^74909680 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 74909680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89851392).

74909680 is an abundant number, since it is smaller than the sum of its proper divisors (104793104).

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

74909680 is a wasteful number, since it uses less digits than its factorization.

74909680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 74909680 is about 8655.0378393165. The cubic root of 74909680 is about 421.5469783427.

The spelling of 74909680 in words is "seventy-four million, nine hundred nine thousand, six hundred eighty".