74273280 has 160 divisors (see below), whose sum is σ = 250430400. Its totient is φ = 18726912.

The previous prime is 74273249. The next prime is 74273291. The reversal of 74273280 is 8237247.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145666 + ... + 146174.

It is an arithmetic number, because the mean of its divisors is an integer number (1565190).

Almost surely, 2^74273280 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 74273280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125215200).

74273280 is an abundant number, since it is smaller than the sum of its proper divisors (176157120).

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

74273280 is a wasteful number, since it uses less digits than its factorization.

74273280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 74273280 is about 8618.1947065496. The cubic root of 74273280 is about 420.3498219278.

The spelling of 74273280 in words is "seventy-four million, two hundred seventy-three thousand, two hundred eighty".