28240773120 has 800 divisors, whose sum is σ = 121802472000. Its totient is φ = 6115295232.

The previous prime is 28240773109. The next prime is 28240773131. The reversal of 28240773120 is 2137704282.

It is an interprime number because it is at equal distance from previous prime (28240773109) and next prime (28240773131).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1486356471 + ... + 1486356489.

It is an arithmetic number, because the mean of its divisors is an integer number (152253090).

Almost surely, 2^28240773120 is an apocalyptic number.

28240773120 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 28240773120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60901236000).

28240773120 is an abundant number, since it is smaller than the sum of its proper divisors (93561698880).

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

28240773120 is an frugal number, since it uses more digits than its factorization.

28240773120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 28240773120 in words is "twenty-eight billion, two hundred forty million, seven hundred seventy-three thousand, one hundred twenty".