28707812 has 12 divisors (see below), whose sum is σ = 57415680. Its totient is φ = 12303336.

The previous prime is 28707787. The next prime is 28707817. The reversal of 28707812 is 21870782.

28707812 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28707817) 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 3 ways as a sum of consecutive naturals, for example, 512612 + ... + 512667.

It is an arithmetic number, because the mean of its divisors is an integer number (4784640).

Almost surely, 2^28707812 is an apocalyptic number.

It is an amenable number.

28707812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28707812 is a wasteful number, since it uses less digits than its factorization.

28707812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025290 (or 1025288 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 28707812 is about 5357.9671518217. The cubic root of 28707812 is about 306.1963653401.

The spelling of 28707812 in words is "twenty-eight million, seven hundred seven thousand, eight hundred twelve".