74786816 has 72 divisors (see below), whose sum is σ = 164135790. Its totient is φ = 33865728.

The previous prime is 74786801. The next prime is 74786839. The reversal of 74786816 is 61868747.

It can be written as a sum of positive squares in 3 ways, for example, as 65545216 + 9241600 = 8096^2 + 3040^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1411046 + ... + 1411098.

Almost surely, 2^74786816 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 74786816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82067895).

74786816 is an abundant number, since it is smaller than the sum of its proper divisors (89348974).

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

74786816 is an equidigital number, since it uses as much as digits as its factorization.

74786816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 68 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 74786816 is about 8647.9370950534. The cubic root of 74786816 is about 421.3163838007.

The spelling of 74786816 in words is "seventy-four million, seven hundred eighty-six thousand, eight hundred sixteen".