28213982 has 16 divisors (see below), whose sum is σ = 45087840. Its totient is φ = 13195008.

The previous prime is 28213973. The next prime is 28213987. The reversal of 28213982 is 28931282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194 + ... + 8162.

It is an arithmetic number, because the mean of its divisors is an integer number (2817990).

Almost surely, 2^28213982 is an apocalyptic number.

28213982 is a deficient number, since it is larger than the sum of its proper divisors (16873858).

28213982 is a wasteful number, since it uses less digits than its factorization.

28213982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155.

The product of its digits is 13824, while the sum is 35.

The square root of 28213982 is about 5311.6835372601. The cubic root of 28213982 is about 304.4304771072.

The spelling of 28213982 in words is "twenty-eight million, two hundred thirteen thousand, nine hundred eighty-two".