28144992 has 24 divisors (see below), whose sum is σ = 73880856. Its totient is φ = 9381632.

The previous prime is 28144981. The next prime is 28145003. The reversal of 28144992 is 29944182.

It is an interprime number because it is at equal distance from previous prime (28144981) and next prime (28145003).

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28144992.

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, 146493 + ... + 146684.

It is an arithmetic number, because the mean of its divisors is an integer number (3078369).

Almost surely, 2^28144992 is an apocalyptic number.

It is an amenable number.

28144992 is an abundant number, since it is smaller than the sum of its proper divisors (45735864).

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

28144992 is a wasteful number, since it uses less digits than its factorization.

28144992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293190 (or 293182 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 28144992 is about 5305.1853879012. The cubic root of 28144992 is about 304.1821392350.

The spelling of 28144992 in words is "twenty-eight million, one hundred forty-four thousand, nine hundred ninety-two".