280013472 has 72 divisors (see below), whose sum is σ = 799134336. Its totient is φ = 93004416.

The previous prime is 280013429. The next prime is 280013509. The reversal of 280013472 is 274310082.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86833 + ... + 89999.

It is an arithmetic number, because the mean of its divisors is an integer number (11099088).

Almost surely, 2^280013472 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 280013472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399567168).

280013472 is an abundant number, since it is smaller than the sum of its proper divisors (519120864).

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

280013472 is a wasteful number, since it uses less digits than its factorization.

280013472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490 (or 3479 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 280013472 is about 16733.6030788351. The cubic root of 280013472 is about 654.2237542040.

The spelling of 280013472 in words is "two hundred eighty million, thirteen thousand, four hundred seventy-two".