74081280 has 352 divisors, whose sum is σ = 297126144. Its totient is φ = 15335424.

The previous prime is 74081263. The next prime is 74081281. The reversal of 74081280 is 8218047.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74081281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1397734 + ... + 1397786.

Almost surely, 2^74081280 is an apocalyptic number.

74081280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74081280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148563072).

74081280 is an abundant number, since it is smaller than the sum of its proper divisors (223044864).

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

74081280 is a wasteful number, since it uses less digits than its factorization.

74081280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 74081280 is about 8607.0482745248. The cubic root of 74081280 is about 419.9873012034.

The spelling of 74081280 in words is "seventy-four million, eighty-one thousand, two hundred eighty".