280979604 has 120 divisors (see below), whose sum is σ = 785473920. Its totient is φ = 87277824.

The previous prime is 280979599. The next prime is 280979617. The reversal of 280979604 is 406979082.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 280979604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 765429 + ... + 765795.

It is an arithmetic number, because the mean of its divisors is an integer number (6545616).

Almost surely, 2^280979604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280979604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392736960).

280979604 is an abundant number, since it is smaller than the sum of its proper divisors (504494316).

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

280979604 is a wasteful number, since it uses less digits than its factorization.

280979604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 280979604 is about 16762.4462415245. The cubic root of 280979604 is about 654.9753144165.

The spelling of 280979604 in words is "two hundred eighty million, nine hundred seventy-nine thousand, six hundred four".