280728364 has 24 divisors (see below), whose sum is σ = 562257920. Its totient is φ = 120140496.

The previous prime is 280728337. The next prime is 280728373. The reversal of 280728364 is 463827082.

280728364 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13909 + ... + 27475.

Almost surely, 2^280728364 is an apocalyptic number.

It is an amenable number.

280728364 is an abundant number, since it is smaller than the sum of its proper divisors (281529556).

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

280728364 is a wasteful number, since it uses less digits than its factorization.

280728364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14317 (or 14315 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 280728364 is about 16754.9504326333. The cubic root of 280728364 is about 654.7800391885.

The spelling of 280728364 in words is "two hundred eighty million, seven hundred twenty-eight thousand, three hundred sixty-four".