28840473 has 12 divisors (see below), whose sum is σ = 41870400. Its totient is φ = 19129176.

The previous prime is 28840463. The next prime is 28840477. The reversal of 28840473 is 37404882.

It is not a de Polignac number, because 28840473 - 2¹³ = 28832281 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28840477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6261 + ... + 9842.

It is an arithmetic number, because the mean of its divisors is an integer number (3489200).

Almost surely, 2^28840473 is an apocalyptic number.

It is an amenable number.

28840473 is a deficient number, since it is larger than the sum of its proper divisors (13029927).

28840473 is a wasteful number, since it uses less digits than its factorization.

28840473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16308 (or 16305 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28840473 is about 5370.3326712598. The cubic root of 28840473 is about 306.6672929781.

The spelling of 28840473 in words is "twenty-eight million, eight hundred forty thousand, four hundred seventy-three".