28831372164 has 144 divisors (see below), whose sum is σ = 84352789248. Its totient is φ = 8133156864.

The previous prime is 28831372147. The next prime is 28831372181. The reversal of 28831372164 is 46127313882.

It is an interprime number because it is at equal distance from previous prime (28831372147) and next prime (28831372181).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6660969 + ... + 6665295.

Almost surely, 2^28831372164 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 28831372164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42176394624).

28831372164 is an abundant number, since it is smaller than the sum of its proper divisors (55521417084).

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

28831372164 is a wasteful number, since it uses less digits than its factorization.

28831372164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674 (or 4669 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 28831372164 in words is "twenty-eight billion, eight hundred thirty-one million, three hundred seventy-two thousand, one hundred sixty-four".