28002772 has 12 divisors (see below), whose sum is σ = 56005600. Its totient is φ = 12001176.

The previous prime is 28002769. The next prime is 28002781. The reversal of 28002772 is 27720082.

28002772 is an admirable number.

It is a super-4 number, since 4×28002772⁴ (a number of 31 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 1000099 = 28002772 / (2 + 8 + 0 + 0 + 2 + 7 + 7 + 2).

28002772 is a modest number, since divided by 2772 gives 28 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 28002772.

It is a congruent number.

It is an unprimeable number.

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, 500022 + ... + 500077.

Almost surely, 2^28002772 is an apocalyptic number.

It is an amenable number.

28002772 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.

28002772 is a wasteful number, since it uses less digits than its factorization.

28002772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000110 (or 1000108 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 28002772 is about 5291.7645450265. The cubic root of 28002772 is about 303.6689176005.

The spelling of 28002772 in words is "twenty-eight million, two thousand, seven hundred seventy-two".