28183642 has 8 divisors (see below), whose sum is σ = 42428916. Its totient is φ = 14040672.

The previous prime is 28183633. The next prime is 28183699. The reversal of 28183642 is 24638182.

It can be written as a sum of positive squares in 2 ways, for example, as 27678121 + 505521 = 5261^2 + 711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28183598 and 28183607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24883 + ... + 25990.

Almost surely, 2^28183642 is an apocalyptic number.

28183642 is a deficient number, since it is larger than the sum of its proper divisors (14245274).

28183642 is a wasteful number, since it uses less digits than its factorization.

28183642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51152.

The product of its digits is 18432, while the sum is 34.

The square root of 28183642 is about 5308.8268007160. The cubic root of 28183642 is about 304.3213145241.

The spelling of 28183642 in words is "twenty-eight million, one hundred eighty-three thousand, six hundred forty-two".