28924236 has 96 divisors (see below), whose sum is σ = 82978560. Its totient is φ = 8640000.

The previous prime is 28924171. The next prime is 28924237. The reversal of 28924236 is 63242982.

It is a super-2 number, since 2×28924236² = 1673222856367392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28924236.

It is not an unprimeable number, because it can be changed into a prime (28924237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115111 + ... + 115361.

It is an arithmetic number, because the mean of its divisors is an integer number (864360).

Almost surely, 2^28924236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28924236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41489280).

28924236 is an abundant number, since it is smaller than the sum of its proper divisors (54054324).

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

28924236 is a wasteful number, since it uses less digits than its factorization.

28924236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 364 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28924236 is about 5378.1256958163. The cubic root of 28924236 is about 306.9638963439.

The spelling of 28924236 in words is "twenty-eight million, nine hundred twenty-four thousand, two hundred thirty-six".