28912012844 has 48 divisors (see below), whose sum is σ = 60449034240. Its totient is φ = 11925291840.

The previous prime is 28912012841. The next prime is 28912012859. The reversal of 28912012844 is 44821021982.

It is not an unprimeable number, because it can be changed into a prime (28912012841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394604 + ... + 462099.

It is an arithmetic number, because the mean of its divisors is an integer number (1259354880).

Almost surely, 2^28912012844 is an apocalyptic number.

It is an amenable number.

28912012844 is an abundant number, since it is smaller than the sum of its proper divisors (31537021396).

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

28912012844 is a wasteful number, since it uses less digits than its factorization.

28912012844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856790 (or 856788 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 28912012844 in words is "twenty-eight billion, nine hundred twelve million, twelve thousand, eight hundred forty-four".