28378584164 has 48 divisors (see below), whose sum is σ = 57242505600. Its totient is φ = 12058488576.

The previous prime is 28378584137. The next prime is 28378584229. The reversal of 28378584164 is 46148587382.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3144122 + ... + 3153134.

It is an arithmetic number, because the mean of its divisors is an integer number (1192552200).

Almost surely, 2^28378584164 is an apocalyptic number.

It is an amenable number.

28378584164 is an abundant number, since it is smaller than the sum of its proper divisors (28863921436).

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

28378584164 is a wasteful number, since it uses less digits than its factorization.

28378584164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9972 (or 9970 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The spelling of 28378584164 in words is "twenty-eight billion, three hundred seventy-eight million, five hundred eighty-four thousand, one hundred sixty-four".