28281400692828 has 12 divisors (see below), whose sum is σ = 65989934949960. Its totient is φ = 9427133564272.

The previous prime is 28281400692821. The next prime is 28281400692889. The reversal of 28281400692828 is 82829600418282.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281400692821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178391695523 + ... + 1178391695546.

It is an arithmetic number, because the mean of its divisors is an integer number (5499161245830).

Almost surely, 2^{28281400692828} is an apocalyptic number.

It is an amenable number.

28281400692828 is an abundant number, since it is smaller than the sum of its proper divisors (37708534257132).

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

28281400692828 is a wasteful number, since it uses less digits than its factorization.

28281400692828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356783391076 (or 2356783391074 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 60.

The spelling of 28281400692828 in words is "twenty-eight trillion, two hundred eighty-one billion, four hundred million, six hundred ninety-two thousand, eight hundred twenty-eight".