28798276731840 has 2688 divisors, whose sum is σ = 136050762086400. Its totient is φ = 5666890014720.

The previous prime is 28798276731827. The next prime is 28798276731893. The reversal of 28798276731840 is 4813767289782.

It is a happy number.

28798276731840 is a `hidden beast` number, since 28 + 7 + 98 + 276 + 73 + 184 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 11262523842 + ... + 11262526398.

It is an arithmetic number, because the mean of its divisors is an integer number (50614122800).

Almost surely, 2^{28798276731840} is an apocalyptic number.

28798276731840 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 28798276731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68025381043200).

28798276731840 is an abundant number, since it is smaller than the sum of its proper divisors (107252485354560).

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

28798276731840 is a wasteful number, since it uses less digits than its factorization.

28798276731840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643 (or 2604 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 72.

The spelling of 28798276731840 in words is "twenty-eight trillion, seven hundred ninety-eight billion, two hundred seventy-six million, seven hundred thirty-one thousand, eight hundred forty".