28784012 has 24 divisors (see below), whose sum is σ = 53202240. Its totient is φ = 13588560.

The previous prime is 28784011. The next prime is 28784023. The reversal of 28784012 is 21048782.

It is a super-2 number, since 2×28784012² = 1657038693632288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28784012.

It is not an unprimeable number, because it can be changed into a prime (28784011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35087 + ... + 35897.

It is an arithmetic number, because the mean of its divisors is an integer number (2216760).

Almost surely, 2^28784012 is an apocalyptic number.

It is an amenable number.

28784012 is a deficient number, since it is larger than the sum of its proper divisors (24418228).

28784012 is a wasteful number, since it uses less digits than its factorization.

28784012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28784012 is about 5365.0733452582. The cubic root of 28784012 is about 306.4670413692.

The spelling of 28784012 in words is "twenty-eight million, seven hundred eighty-four thousand, twelve".