28260784 has 20 divisors (see below), whose sum is σ = 54837760. Its totient is φ = 14109120.

The previous prime is 28260781. The next prime is 28260787. The reversal of 28260784 is 48706282.

It is an interprime number because it is at equal distance from previous prime (28260781) and next prime (28260787).

It is not an unprimeable number, because it can be changed into a prime (28260781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19774 + ... + 21154.

It is an arithmetic number, because the mean of its divisors is an integer number (2741888).

Almost surely, 2^28260784 is an apocalyptic number.

It is an amenable number.

28260784 is a deficient number, since it is larger than the sum of its proper divisors (26576976).

28260784 is a wasteful number, since it uses less digits than its factorization.

28260784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 28260784 is about 5316.0872829554. The cubic root of 28260784 is about 304.5987161995.

The spelling of 28260784 in words is "twenty-eight million, two hundred sixty thousand, seven hundred eighty-four".