28891746286 has 16 divisors (see below), whose sum is σ = 48700469664. Its totient is φ = 12754884384.

The previous prime is 28891746281. The next prime is 28891746287. The reversal of 28891746286 is 68264719882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891746281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24156381 + ... + 24157576.

It is an arithmetic number, because the mean of its divisors is an integer number (3043779354).

Almost surely, 2^28891746286 is an apocalyptic number.

28891746286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28891746286 is a deficient number, since it is larger than the sum of its proper divisors (19808723378).

28891746286 is a wasteful number, since it uses less digits than its factorization.

28891746286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48313995.

The product of its digits is 18579456, while the sum is 61.

The spelling of 28891746286 in words is "twenty-eight billion, eight hundred ninety-one million, seven hundred forty-six thousand, two hundred eighty-six".