28162323 has 20 divisors (see below), whose sum is σ = 48080560. Its totient is φ = 16092432.

The previous prime is 28162307. The next prime is 28162331. The reversal of 28162323 is 32326182.

28162323 is a `hidden beast` number, since 281 + 62 + 323 = 666.

It is not a de Polignac number, because 28162323 - 2⁴ = 28162307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28162223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24268 + ... + 25401.

It is an arithmetic number, because the mean of its divisors is an integer number (2404028).

Almost surely, 2^28162323 is an apocalyptic number.

28162323 is a deficient number, since it is larger than the sum of its proper divisors (19918237).

28162323 is an equidigital number, since it uses as much as digits as its factorization.

28162323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49688 (or 49679 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 28162323 is about 5306.8185384466. The cubic root of 28162323 is about 304.2445624060.

The spelling of 28162323 in words is "twenty-eight million, one hundred sixty-two thousand, three hundred twenty-three".