74861280 has 384 divisors, whose sum is σ = 298045440. Its totient is φ = 17418240.

The previous prime is 74861279. The next prime is 74861299. The reversal of 74861280 is 8216847.

It is a super-2 number, since 2×74861280² = 11208422486476800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1740939 + ... + 1740981.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^74861280 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 74861280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149022720).

74861280 is an abundant number, since it is smaller than the sum of its proper divisors (223184160).

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

74861280 is a wasteful number, since it uses less digits than its factorization.

74861280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 74861280 is about 8652.2413281184. The cubic root of 74861280 is about 421.4561700097.

The spelling of 74861280 in words is "seventy-four million, eight hundred sixty-one thousand, two hundred eighty".