280772 has 12 divisors (see below), whose sum is σ = 520380. Its totient is φ = 132096.

The previous prime is 280771. The next prime is 280811. The reversal of 280772 is 277082.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 92416 = 434^2 + 304^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280772.

It is not an unprimeable number, because it can be changed into a prime (280771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997 + ... + 2132.

It is an arithmetic number, because the mean of its divisors is an integer number (43365).

2²⁸⁰⁷⁷² is an apocalyptic number.

It is an amenable number.

280772 is a deficient number, since it is larger than the sum of its proper divisors (239608).

280772 is a wasteful number, since it uses less digits than its factorization.

280772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150 (or 4148 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 280772 is about 529.8792315236. The cubic root of 280772 is about 65.4813963443.

The spelling of 280772 in words is "two hundred eighty thousand, seven hundred seventy-two".