28783270 has 24 divisors (see below), whose sum is σ = 52976304. Its totient is φ = 11259696.

The previous prime is 28783219. The next prime is 28783301. The reversal of 28783270 is 7238782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21439 + ... + 22741.

It is an arithmetic number, because the mean of its divisors is an integer number (2207346).

Almost surely, 2^28783270 is an apocalyptic number.

28783270 is a deficient number, since it is larger than the sum of its proper divisors (24193034).

28783270 is a wasteful number, since it uses less digits than its factorization.

28783270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 28783270 is about 5365.0041938474. The cubic root of 28783270 is about 306.4644079571.

The spelling of 28783270 in words is "twenty-eight million, seven hundred eighty-three thousand, two hundred seventy".