28582812 has 18 divisors (see below), whose sum is σ = 72251088. Its totient is φ = 9527592.

The previous prime is 28582789. The next prime is 28582861. The reversal of 28582812 is 21828582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 793967 = 28582812 / (2 + 8 + 5 + 8 + 2 + 8 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396948 + ... + 397019.

Almost surely, 2^28582812 is an apocalyptic number.

It is an amenable number.

28582812 is an abundant number, since it is smaller than the sum of its proper divisors (43668276).

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

28582812 is a wasteful number, since it uses less digits than its factorization.

28582812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793977 (or 793972 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 28582812 is about 5346.2895544480. The cubic root of 28582812 is about 305.7513037623.

The spelling of 28582812 in words is "twenty-eight million, five hundred eighty-two thousand, eight hundred twelve".