28372974 has 32 divisors (see below), whose sum is σ = 65339136. Its totient is φ = 8045760.

The previous prime is 28372963. The next prime is 28372979. The reversal of 28372974 is 47927382.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3289 + ... + 8219.

It is an arithmetic number, because the mean of its divisors is an integer number (2041848).

Almost surely, 2^28372974 is an apocalyptic number.

28372974 is an abundant number, since it is smaller than the sum of its proper divisors (36966162).

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

28372974 is a wasteful number, since it uses less digits than its factorization.

28372974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080.

The product of its digits is 169344, while the sum is 42.

The square root of 28372974 is about 5326.6287649882. The cubic root of 28372974 is about 305.0012505548.

The spelling of 28372974 in words is "twenty-eight million, three hundred seventy-two thousand, nine hundred seventy-four".