28492922880 has 640 divisors, whose sum is σ = 108478774800. Its totient is φ = 7134511104.

The previous prime is 28492922873. The next prime is 28492922897. The reversal of 28492922880 is 8822929482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 252149704 + ... + 252149816.

Almost surely, 2^28492922880 is an apocalyptic number.

28492922880 is a gapful number since it is divisible by the number (20) 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 28492922880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54239387400).

28492922880 is an abundant number, since it is smaller than the sum of its proper divisors (79985851920).

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

28492922880 is an equidigital number, since it uses as much as digits as its factorization.

28492922880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 28492922880 in words is "twenty-eight billion, four hundred ninety-two million, nine hundred twenty-two thousand, eight hundred eighty".