28123974 has 24 divisors (see below), whose sum is σ = 61161672. Its totient is φ = 9339840.

The previous prime is 28123937. The next prime is 28123993. The reversal of 28123974 is 47932182.

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, 2334 + ... + 7854.

It is an arithmetic number, because the mean of its divisors is an integer number (2548403).

Almost surely, 2^28123974 is an apocalyptic number.

28123974 is an abundant number, since it is smaller than the sum of its proper divisors (33037698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28123974 is a wasteful number, since it uses less digits than its factorization.

28123974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812 (or 5809 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28123974 is about 5303.2041258092. The cubic root of 28123974 is about 304.1064017549.

It can be divided in two parts, 2812 and 3974, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 28123974 in words is "twenty-eight million, one hundred twenty-three thousand, nine hundred seventy-four".