28599923 has 18 divisors (see below), whose sum is σ = 32419548. Its totient is φ = 25208920.

The previous prime is 28599917. The next prime is 28599929. The reversal of 28599923 is 32999582.

It is an interprime number because it is at equal distance from previous prime (28599917) and next prime (28599929).

It is not a de Polignac number, because 28599923 - 2¹⁴ = 28583539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28599929) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 267236 + ... + 267342.

It is an arithmetic number, because the mean of its divisors is an integer number (1801086).

Almost surely, 2^28599923 is an apocalyptic number.

28599923 is a deficient number, since it is larger than the sum of its proper divisors (3819625).

28599923 is a wasteful number, since it uses less digits than its factorization.

28599923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 165 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 28599923 is about 5347.8895837517. The cubic root of 28599923 is about 305.8123039060.

The spelling of 28599923 in words is "twenty-eight million, five hundred ninety-nine thousand, nine hundred twenty-three".