28744284 has 12 divisors (see below), whose sum is σ = 67070024. Its totient is φ = 9581424.

The previous prime is 28744271. The next prime is 28744327. The reversal of 28744284 is 48244782.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1197667 + ... + 1197690.

Almost surely, 2^28744284 is an apocalyptic number.

It is an amenable number.

28744284 is an abundant number, since it is smaller than the sum of its proper divisors (38325740).

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

28744284 is a wasteful number, since it uses less digits than its factorization.

28744284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395364 (or 2395362 counting only the distinct ones).

The product of its digits is 114688, while the sum is 39.

The square root of 28744284 is about 5361.3696011374. The cubic root of 28744284 is about 306.3259800928.

The spelling of 28744284 in words is "twenty-eight million, seven hundred forty-four thousand, two hundred eighty-four".