28372443 has 24 divisors (see below), whose sum is σ = 42491904. Its totient is φ = 16819440.

The previous prime is 28372433. The next prime is 28372457. The reversal of 28372443 is 34427382.

It is not a de Polignac number, because 28372443 - 2¹⁴ = 28356059 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (28372433) 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, 16230 + ... + 17892.

It is an arithmetic number, because the mean of its divisors is an integer number (1770496).

Almost surely, 2^28372443 is an apocalyptic number.

28372443 is a deficient number, since it is larger than the sum of its proper divisors (14119461).

28372443 is a wasteful number, since it uses less digits than its factorization.

28372443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1724 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 28372443 is about 5326.5789208459. The cubic root of 28372443 is about 304.9993478442. Note that the first 3 decimals are identical.

The spelling of 28372443 in words is "twenty-eight million, three hundred seventy-two thousand, four hundred forty-three".