74147280 has 80 divisors (see below), whose sum is σ = 231038784. Its totient is φ = 19671040.

The previous prime is 74147273. The next prime is 74147321. The reversal of 74147280 is 8274147.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53800 + ... + 55160.

Almost surely, 2^74147280 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 74147280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115519392).

74147280 is an abundant number, since it is smaller than the sum of its proper divisors (156891504).

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

74147280 is a wasteful number, since it uses less digits than its factorization.

74147280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 74147280 is about 8610.8814879779. The cubic root of 74147280 is about 420.1119882775. Note that the first 3 decimals are identical.

The spelling of 74147280 in words is "seventy-four million, one hundred forty-seven thousand, two hundred eighty".