28181883 has 32 divisors (see below), whose sum is σ = 41932800. Its totient is φ = 16761600.

The previous prime is 28181863. The next prime is 28181891. The reversal of 28181883 is 38818182.

It is not a de Polignac number, because 28181883 - 2⁵ = 28181851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28181843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72253 + ... + 72641.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^28181883 is an apocalyptic number.

28181883 is a deficient number, since it is larger than the sum of its proper divisors (13750917).

28181883 is a wasteful number, since it uses less digits than its factorization.

28181883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483.

The product of its digits is 24576, while the sum is 39.

The square root of 28181883 is about 5308.6611306430. The cubic root of 28181883 is about 304.3149832827.

The spelling of 28181883 in words is "twenty-eight million, one hundred eighty-one thousand, eight hundred eighty-three".