28372776768 has 224 divisors, whose sum is σ = 96891774720. Its totient is φ = 7973406720.

The previous prime is 28372776743. The next prime is 28372776823. The reversal of 28372776768 is 86767727382.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 718630 + ... + 757082.

Almost surely, 2^28372776768 is an apocalyptic number.

28372776768 is a gapful number since it is divisible by the number (28) 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 28372776768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48445887360).

28372776768 is an abundant number, since it is smaller than the sum of its proper divisors (68518997952).

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

28372776768 is a wasteful number, since it uses less digits than its factorization.

28372776768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38542 (or 38526 counting only the distinct ones).

The product of its digits is 66382848, while the sum is 63.

The spelling of 28372776768 in words is "twenty-eight billion, three hundred seventy-two million, seven hundred seventy-six thousand, seven hundred sixty-eight".