28376400312 has 144 divisors (see below), whose sum is σ = 85523157720. Its totient is φ = 8449280640.

The previous prime is 28376400301. The next prime is 28376400319. The reversal of 28376400312 is 21300467382.

It is a happy number.

28376400312 is a `hidden beast` number, since 2 + 8 + 3 + 7 + 640 + 0 + 3 + 1 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28376400319) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 883723 + ... + 915269.

Almost surely, 2^28376400312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28376400312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42761578860).

28376400312 is an abundant number, since it is smaller than the sum of its proper divisors (57146757408).

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

28376400312 is a wasteful number, since it uses less digits than its factorization.

28376400312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31634 (or 31596 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

Adding to 28376400312 its reverse (21300467382), we get a palindrome (49676867694).

The spelling of 28376400312 in words is "twenty-eight billion, three hundred seventy-six million, four hundred thousand, three hundred twelve".