74780244 has 144 divisors (see below), whose sum is σ = 240589440. Its totient is φ = 19019520.

The previous prime is 74780239. The next prime is 74780323. The reversal of 74780244 is 44208747.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74780199 and 74780208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146662 + ... + 147170.

It is an arithmetic number, because the mean of its divisors is an integer number (1670760).

Almost surely, 2^74780244 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 74780244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120294720).

74780244 is an abundant number, since it is smaller than the sum of its proper divisors (165809196).

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

74780244 is a wasteful number, since it uses less digits than its factorization.

74780244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 74780244 is about 8647.5571116935. The cubic root of 74780244 is about 421.3040421763.

The spelling of 74780244 in words is "seventy-four million, seven hundred eighty thousand, two hundred forty-four".