280078328 has 32 divisors (see below), whose sum is σ = 537726000. Its totient is φ = 136719360.

The previous prime is 280078327. The next prime is 280078387. The reversal of 280078328 is 823870082.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 280078291 and 280078300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280078327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65768 + ... + 69896.

Almost surely, 2^280078328 is an apocalyptic number.

It is an amenable number.

280078328 is a deficient number, since it is larger than the sum of its proper divisors (257647672).

280078328 is a wasteful number, since it uses less digits than its factorization.

280078328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335 (or 4331 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 280078328 is about 16735.5408636829. The cubic root of 280078328 is about 654.2742601792.

The spelling of 280078328 in words is "two hundred eighty million, seventy-eight thousand, three hundred twenty-eight".