28485812 has 12 divisors (see below), whose sum is σ = 52782660. Its totient is φ = 13405056.

The previous prime is 28485811. The next prime is 28485851. The reversal of 28485812 is 21858482.

It can be written as a sum of positive squares in 2 ways, for example, as 18284176 + 10201636 = 4276^2 + 3194^2 .

It is a super-2 number, since 2×28485812² = 1622882970598688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209387 + ... + 209522.

It is an arithmetic number, because the mean of its divisors is an integer number (4398555).

Almost surely, 2^28485812 is an apocalyptic number.

It is an amenable number.

28485812 is a deficient number, since it is larger than the sum of its proper divisors (24296848).

28485812 is a wasteful number, since it uses less digits than its factorization.

28485812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418930 (or 418928 counting only the distinct ones).

The product of its digits is 40960, while the sum is 38.

The square root of 28485812 is about 5337.2101326442. The cubic root of 28485812 is about 305.4050410115.

The spelling of 28485812 in words is "twenty-eight million, four hundred eighty-five thousand, eight hundred twelve".