28032894 has 24 divisors (see below), whose sum is σ = 60835320. Its totient is φ = 9329328.

The previous prime is 28032887. The next prime is 28032899. The reversal of 28032894 is 49823082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21637 + ... + 22895.

It is an arithmetic number, because the mean of its divisors is an integer number (2534805).

Almost surely, 2^28032894 is an apocalyptic number.

28032894 is an abundant number, since it is smaller than the sum of its proper divisors (32802426).

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

28032894 is a wasteful number, since it uses less digits than its factorization.

28032894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504 (or 2501 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28032894 is about 5294.6099006442. The cubic root of 28032894 is about 303.7777620309. Note that the first 4 decimals are identical.

The spelling of 28032894 in words is "twenty-eight million, thirty-two thousand, eight hundred ninety-four".