28372392 has 48 divisors (see below), whose sum is σ = 78156000. Its totient is φ = 9295776.

The previous prime is 28372387. The next prime is 28372397. The reversal of 28372392 is 29327382.

It is an interprime number because it is at equal distance from previous prime (28372387) and next prime (28372397).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28372397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 909 + ... + 7587.

It is an arithmetic number, because the mean of its divisors is an integer number (1628250).

Almost surely, 2^28372392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28372392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39078000).

28372392 is an abundant number, since it is smaller than the sum of its proper divisors (49783608).

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

28372392 is a wasteful number, since it uses less digits than its factorization.

28372392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6750 (or 6743 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 28372392 is about 5326.5741335309. The cubic root of 28372392 is about 304.9991650967. Note that the first 3 decimals are identical.

The spelling of 28372392 in words is "twenty-eight million, three hundred seventy-two thousand, three hundred ninety-two".