28180323 has 12 divisors (see below), whose sum is σ = 40757808. Its totient is φ = 18762480.

The previous prime is 28180319. The next prime is 28180357. The reversal of 28180323 is 32308182.

It is not a de Polignac number, because 28180323 - 2² = 28180319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28180393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7761 + ... + 10797.

It is an arithmetic number, because the mean of its divisors is an integer number (3396484).

Almost surely, 2^28180323 is an apocalyptic number.

28180323 is a deficient number, since it is larger than the sum of its proper divisors (12577485).

28180323 is a wasteful number, since it uses less digits than its factorization.

28180323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074 (or 4071 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28180323 is about 5308.5141989073. The cubic root of 28180323 is about 304.3093680897.

The spelling of 28180323 in words is "twenty-eight million, one hundred eighty thousand, three hundred twenty-three".