280783825 has 12 divisors (see below), whose sum is σ = 397911040. Its totient is φ = 192537360.

The previous prime is 280783823. The next prime is 280783831. The reversal of 280783825 is 528387082.

It is not a de Polignac number, because 280783825 - 2¹ = 280783823 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (280783823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 802065 + ... + 802414.

Almost surely, 2^280783825 is an apocalyptic number.

280783825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280783825 is a deficient number, since it is larger than the sum of its proper divisors (117127215).

280783825 is a wasteful number, since it uses less digits than its factorization.

280783825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604496 (or 1604491 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 280783825 is about 16756.6054139853. The cubic root of 280783825 is about 654.8231560341.

The spelling of 280783825 in words is "two hundred eighty million, seven hundred eighty-three thousand, eight hundred twenty-five".