74770280 has 64 divisors (see below), whose sum is σ = 184660560. Its totient is φ = 27076608.

The previous prime is 74770259. The next prime is 74770327. The reversal of 74770280 is 8207747.

It can be written as a sum of positive squares in 8 ways, for example, as 50779876 + 23990404 = 7126^2 + 4898^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74770280.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26204 + ... + 28916.

Almost surely, 2^74770280 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 74770280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92330280).

74770280 is an abundant number, since it is smaller than the sum of its proper divisors (109890280).

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

74770280 is a wasteful number, since it uses less digits than its factorization.

74770280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790 (or 2786 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 74770280 is about 8646.9809760401. The cubic root of 74770280 is about 421.2853293019.

The spelling of 74770280 in words is "seventy-four million, seven hundred seventy thousand, two hundred eighty".