280257472 has 56 divisors (see below), whose sum is σ = 609447600. Its totient is φ = 126812160.

The previous prime is 280257469. The next prime is 280257487. The reversal of 280257472 is 274752082.

It is a super-2 number, since 2×280257472² = 157088501223661568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180154 + ... + 181702.

Almost surely, 2^280257472 is an apocalyptic number.

280257472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280257472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304723800).

280257472 is an abundant number, since it is smaller than the sum of its proper divisors (329190128).

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

280257472 is a wasteful number, since it uses less digits than its factorization.

280257472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 280257472 is about 16740.8922103931. The cubic root of 280257472 is about 654.4137263158.

It can be divided in two parts, 280 and 257472, that added together give a palindrome (257752).

The spelling of 280257472 in words is "two hundred eighty million, two hundred fifty-seven thousand, four hundred seventy-two".