28801983 has 16 divisors (see below), whose sum is σ = 44015616. Its totient is φ = 16410720.

The previous prime is 28801979. The next prime is 28802071. The reversal of 28801983 is 38910882.

It is not a de Polignac number, because 28801983 - 2² = 28801979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28801963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6253 + ... + 9833.

It is an arithmetic number, because the mean of its divisors is an integer number (2750976).

Almost surely, 2^28801983 is an apocalyptic number.

28801983 is a deficient number, since it is larger than the sum of its proper divisors (15213633).

28801983 is a wasteful number, since it uses less digits than its factorization.

28801983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 28801983 is about 5366.7478979360. The cubic root of 28801983 is about 306.5308079423.

It can be divided in two parts, 28 and 801983, that added together give a triangular number (802011 = T₁₂₆₆).

The spelling of 28801983 in words is "twenty-eight million, eight hundred one thousand, nine hundred eighty-three".