28440760 has 16 divisors (see below), whose sum is σ = 63991800. Its totient is φ = 11376288.

The previous prime is 28440749. The next prime is 28440791. The reversal of 28440760 is 6704482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355470 + ... + 355549.

Almost surely, 2^28440760 is an apocalyptic number.

28440760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28440760 is an abundant number, since it is smaller than the sum of its proper divisors (35551040).

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

28440760 is a wasteful number, since it uses less digits than its factorization.

28440760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711030 (or 711026 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 28440760 is about 5332.9879054804. The cubic root of 28440760 is about 305.2439506658.

The spelling of 28440760 in words is "twenty-eight million, four hundred forty thousand, seven hundred sixty".