28381474 has 16 divisors (see below), whose sum is σ = 46526976. Its totient is φ = 12877200.

The previous prime is 28381453. The next prime is 28381511. The reversal of 28381474 is 47418382.

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, 18559 + ... + 20029.

It is an arithmetic number, because the mean of its divisors is an integer number (2907936).

Almost surely, 2^28381474 is an apocalyptic number.

28381474 is a deficient number, since it is larger than the sum of its proper divisors (18145502).

28381474 is a wasteful number, since it uses less digits than its factorization.

28381474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361.

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

The square root of 28381474 is about 5327.4265832576. The cubic root of 28381474 is about 305.0317050263.

The spelling of 28381474 in words is "twenty-eight million, three hundred eighty-one thousand, four hundred seventy-four".