28375623 has 8 divisors (see below), whose sum is σ = 42038000. Its totient is φ = 18917064.

The previous prime is 28375549. The next prime is 28375631. The reversal of 28375623 is 32657382.

28375623 is a `hidden beast` number, since 28 + 3 + 7 + 5 + 623 = 666.

It is not a de Polignac number, because 28375623 - 2⁹ = 28375111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28375663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525448 + ... + 525501.

It is an arithmetic number, because the mean of its divisors is an integer number (5254750).

Almost surely, 2^28375623 is an apocalyptic number.

28375623 is a deficient number, since it is larger than the sum of its proper divisors (13662377).

28375623 is a wasteful number, since it uses less digits than its factorization.

28375623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050958 (or 1050952 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 28375623 is about 5326.8774155222. The cubic root of 28375623 is about 305.0107422536.

The spelling of 28375623 in words is "twenty-eight million, three hundred seventy-five thousand, six hundred twenty-three".