74909784 has 64 divisors (see below), whose sum is σ = 198316800. Its totient is φ = 23538816.

The previous prime is 74909771. The next prime is 74909801. The reversal of 74909784 is 48790947.

It is a happy number.

It is a super-2 number, since 2×74909784² = 11222951477853312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28677 + ... + 31179.

It is an arithmetic number, because the mean of its divisors is an integer number (3098700).

Almost surely, 2^74909784 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 74909784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99158400).

74909784 is an abundant number, since it is smaller than the sum of its proper divisors (123407016).

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

74909784 is a wasteful number, since it uses less digits than its factorization.

74909784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 74909784 is about 8655.0438473759. The cubic root of 74909784 is about 421.5471734259.

The spelling of 74909784 in words is "seventy-four million, nine hundred nine thousand, seven hundred eighty-four".