280380633 has 24 divisors (see below), whose sum is σ = 410564160. Its totient is φ = 170089920.

The previous prime is 280380623. The next prime is 280380637. The reversal of 280380633 is 336083082.

It is not a de Polignac number, because 280380633 - 2⁸ = 280380377 is a prime.

It is a super-2 number, since 2×280380633² = 157226598722961378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280380594 and 280380603.

It is not an unprimeable number, because it can be changed into a prime (280380637) 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 23 ways as a sum of consecutive naturals, for example, 32103 + ... + 39891.

It is an arithmetic number, because the mean of its divisors is an integer number (17106840).

Almost surely, 2^280380633 is an apocalyptic number.

It is an amenable number.

280380633 is a deficient number, since it is larger than the sum of its proper divisors (130183527).

280380633 is a wasteful number, since it uses less digits than its factorization.

280380633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889 (or 7876 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 280380633 is about 16744.5702542645. The cubic root of 280380633 is about 654.5095744238.

It can be divided in two parts, 2803 and 80633, that added together give a triangular number (83436 = T₄₀₈).

The spelling of 280380633 in words is "two hundred eighty million, three hundred eighty thousand, six hundred thirty-three".