280820032 has 28 divisors (see below), whose sum is σ = 561279040. Its totient is φ = 139395456.

The previous prime is 280820003. The next prime is 280820039. The reversal of 280820032 is 230028082.

It is a junction number, because it is equal to n+sod(n) for n = 280819979 and 280820006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280820039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6888 + ... + 24679.

It is an arithmetic number, because the mean of its divisors is an integer number (20045680).

Almost surely, 2^280820032 is an apocalyptic number.

It is an amenable number.

280820032 is a deficient number, since it is larger than the sum of its proper divisors (280459008).

280820032 is a wasteful number, since it uses less digits than its factorization.

280820032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31718 (or 31708 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 280820032 is about 16757.6857590778. The cubic root of 280820032 is about 654.8513012486.

The spelling of 280820032 in words is "two hundred eighty million, eight hundred twenty thousand, thirty-two".