28874493 has 24 divisors (see below), whose sum is σ = 42943680. Its totient is φ = 18688320.

The previous prime is 28874491. The next prime is 28874501. The reversal of 28874493 is 39447882.

It is not a de Polignac number, because 28874493 - 2¹ = 28874491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28874491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46338 + ... + 46956.

It is an arithmetic number, because the mean of its divisors is an integer number (1789320).

Almost surely, 2^28874493 is an apocalyptic number.

It is an amenable number.

28874493 is a deficient number, since it is larger than the sum of its proper divisors (14069187).

28874493 is a wasteful number, since it uses less digits than its factorization.

28874493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 766 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28874493 is about 5373.4991392946. The cubic root of 28874493 is about 306.7878263900.

The spelling of 28874493 in words is "twenty-eight million, eight hundred seventy-four thousand, four hundred ninety-three".