28353623 has 8 divisors (see below), whose sum is σ = 29331456. Its totient is φ = 27379800.

The previous prime is 28353617. The next prime is 28353631. The reversal of 28353623 is 32635382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28353623 - 2¹⁶ = 28288087 is a prime.

It is a super-2 number, since 2×28353623² = 1607855874452258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28353623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28353323) 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, 22418 + ... + 23648.

It is an arithmetic number, because the mean of its divisors is an integer number (3666432).

Almost surely, 2^28353623 is an apocalyptic number.

28353623 is a deficient number, since it is larger than the sum of its proper divisors (977833).

28353623 is a wasteful number, since it uses less digits than its factorization.

28353623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005.

The product of its digits is 25920, while the sum is 32.

The square root of 28353623 is about 5324.8120154612. The cubic root of 28353623 is about 304.9318955705.

The spelling of 28353623 in words is "twenty-eight million, three hundred fifty-three thousand, six hundred twenty-three".