280529072 has 40 divisors (see below), whose sum is σ = 580014960. Its totient is φ = 131051520.

The previous prime is 280529059. The next prime is 280529099. The reversal of 280529072 is 270925082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15872 + ... + 28512.

It is an arithmetic number, because the mean of its divisors is an integer number (14500374).

Almost surely, 2^280529072 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 280529072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290007480).

280529072 is an abundant number, since it is smaller than the sum of its proper divisors (299485888).

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

280529072 is a wasteful number, since it uses less digits than its factorization.

280529072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12741 (or 12735 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 280529072 is about 16749.0021195294. The cubic root of 280529072 is about 654.6250574436.

The spelling of 280529072 in words is "two hundred eighty million, five hundred twenty-nine thousand, seventy-two".