28040284712 has 32 divisors (see below), whose sum is σ = 57467901600. Its totient is φ = 12720523200.

The previous prime is 28040284693. The next prime is 28040284733. The reversal of 28040284712 is 21748204082.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268214 + ... + 357797.

It is an arithmetic number, because the mean of its divisors is an integer number (1795871925).

Almost surely, 2^28040284712 is an apocalyptic number.

28040284712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28040284712 is an abundant number, since it is smaller than the sum of its proper divisors (29427616888).

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

28040284712 is a wasteful number, since it uses less digits than its factorization.

28040284712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626537 (or 626533 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 38.

Adding to 28040284712 its reverse (21748204082), we get a palindrome (49788488794).

The spelling of 28040284712 in words is "twenty-eight billion, forty million, two hundred eighty-four thousand, seven hundred twelve".