28733406891812 has 12 divisors (see below), whose sum is σ = 57466813783680. Its totient is φ = 12314317239336.

The previous prime is 28733406891811. The next prime is 28733406891859. The reversal of 28733406891812 is 21819860433782.

28733406891812 is an admirable number.

It is a super-2 number, since 2×28733406891812² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28733406891811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513096551612 + ... + 513096551667.

It is an arithmetic number, because the mean of its divisors is an integer number (4788901148640).

Almost surely, 2^{28733406891812} is an apocalyptic number.

It is an amenable number.

28733406891812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28733406891812 is a wasteful number, since it uses less digits than its factorization.

28733406891812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026193103290 (or 1026193103288 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 28733406891812 in words is "twenty-eight trillion, seven hundred thirty-three billion, four hundred six million, eight hundred ninety-one thousand, eight hundred twelve".