28372623 has 4 divisors (see below), whose sum is σ = 37830168. Its totient is φ = 18915080.

The previous prime is 28372621. The next prime is 28372627. The reversal of 28372623 is 32627382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28372623 - 2¹ = 28372621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4728768 + ... + 4728773.

It is an arithmetic number, because the mean of its divisors is an integer number (9457542).

Almost surely, 2^28372623 is an apocalyptic number.

28372623 is a deficient number, since it is larger than the sum of its proper divisors (9457545).

28372623 is an equidigital number, since it uses as much as digits as its factorization.

28372623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457544.

The product of its digits is 24192, while the sum is 33.

The square root of 28372623 is about 5326.5958172176. The cubic root of 28372623 is about 304.9999928335. Note that the first 5 decimals are identical.

It can be divided in two parts, 2837 and 2623, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 28372623 in words is "twenty-eight million, three hundred seventy-two thousand, six hundred twenty-three".