74624690728 has 128 divisors (see below), whose sum is σ = 172553472000. Its totient is φ = 30194035200.

The previous prime is 74624690663. The next prime is 74624690809. The reversal of 74624690728 is 82709642647.

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, 3476926 + ... + 3498322.

It is an arithmetic number, because the mean of its divisors is an integer number (1348074000).

Almost surely, 2^74624690728 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 74624690728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86276736000).

74624690728 is an abundant number, since it is smaller than the sum of its proper divisors (97928781272).

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

74624690728 is a wasteful number, since it uses less digits than its factorization.

74624690728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21496 (or 21478 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 74624690728 in words is "seventy-four billion, six hundred twenty-four million, six hundred ninety thousand, seven hundred twenty-eight".