28843836 has 24 divisors (see below), whose sum is σ = 76917120. Its totient is φ = 8241072.

The previous prime is 28843783. The next prime is 28843847. The reversal of 28843836 is 63834882.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171606 + ... + 171773.

It is an arithmetic number, because the mean of its divisors is an integer number (3204880).

Almost surely, 2^28843836 is an apocalyptic number.

It is an amenable number.

28843836 is an abundant number, since it is smaller than the sum of its proper divisors (48073284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28843836 is a wasteful number, since it uses less digits than its factorization.

28843836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343393 (or 343391 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 28843836 is about 5370.6457712271. The cubic root of 28843836 is about 306.6792123622.

The spelling of 28843836 in words is "twenty-eight million, eight hundred forty-three thousand, eight hundred thirty-six".