28288771392 has 112 divisors (see below), whose sum is σ = 90571685760. Its totient is φ = 7607058432.

The previous prime is 28288771369. The next prime is 28288771397. The reversal of 28288771392 is 29317788282.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28288771397) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 596217 + ... + 641912.

Almost surely, 2^28288771392 is an apocalyptic number.

It is an amenable number.

28288771392 is an abundant number, since it is smaller than the sum of its proper divisors (62282914368).

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

28288771392 is a wasteful number, since it uses less digits than its factorization.

28288771392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238168 (or 1238158 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The spelling of 28288771392 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred seventy-one thousand, three hundred ninety-two".