28372245 has 32 divisors (see below), whose sum is σ = 49762944. Its totient is φ = 13689600.

The previous prime is 28372243. The next prime is 28372247. The reversal of 28372245 is 54227382.

It is an interprime number because it is at equal distance from previous prime (28372243) and next prime (28372247).

It is not a de Polignac number, because 28372245 - 2¹ = 28372243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372243) 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 31 ways as a sum of consecutive naturals, for example, 61315 + ... + 61775.

It is an arithmetic number, because the mean of its divisors is an integer number (1555092).

Almost surely, 2^28372245 is an apocalyptic number.

It is an amenable number.

28372245 is a deficient number, since it is larger than the sum of its proper divisors (21390699).

28372245 is a wasteful number, since it uses less digits than its factorization.

28372245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 26880, while the sum is 33.

The square root of 28372245 is about 5326.5603347752. The cubic root of 28372245 is about 304.9986383528.

It can be divided in two parts, 28 and 372245, that added together give a palindrome (372273).

The spelling of 28372245 in words is "twenty-eight million, three hundred seventy-two thousand, two hundred forty-five".