28764992 has 28 divisors (see below), whose sum is σ = 57546240. Its totient is φ = 14265216.

The previous prime is 28764971. The next prime is 28765001. The reversal of 28764992 is 29946782.

28764992 is an admirable number.

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, 6359 + ... + 9897.

Almost surely, 2^28764992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28764992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28773120).

28764992 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.

28764992 is a wasteful number, since it uses less digits than its factorization.

28764992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678 (or 3668 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 28764992 is about 5363.3004763858. The cubic root of 28764992 is about 306.3995237081.

The spelling of 28764992 in words is "twenty-eight million, seven hundred sixty-four thousand, nine hundred ninety-two".