28775122992 has 840 divisors, whose sum is σ = 111244665600. Its totient is φ = 7113173760.

The previous prime is 28775122967. The next prime is 28775123051. The reversal of 28775122992 is 29922157782.

28775122992 is a `hidden beast` number, since 287 + 7 + 51 + 229 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (2540160) is a multiple of the sum of its prime divisors (245).

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 167 ways as a sum of consecutive naturals, for example, 144598509 + ... + 144598707.

Almost surely, 2^28775122992 is an apocalyptic number.

28775122992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28775122992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55622332800).

28775122992 is an abundant number, since it is smaller than the sum of its proper divisors (82469542608).

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

28775122992 is a wasteful number, since it uses less digits than its factorization.

28775122992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 245 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 28775122992 in words is "twenty-eight billion, seven hundred seventy-five million, one hundred twenty-two thousand, nine hundred ninety-two".