28281400692816 has 40 divisors (see below), whose sum is σ = 73060495953984. Its totient is φ = 9427106360320.

The previous prime is 28281400692791. The next prime is 28281400692821. The reversal of 28281400692816 is 61829600418282.

It is a super-2 number, since 2×28281400692816² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 22659136 + ... + 23874656.

Almost surely, 2^{28281400692816} is an apocalyptic number.

It is an amenable number.

28281400692816 is an abundant number, since it is smaller than the sum of its proper divisors (44779095261168).

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

28281400692816 is a wasteful number, since it uses less digits than its factorization.

28281400692816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700259 (or 1700253 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 57.

The spelling of 28281400692816 in words is "twenty-eight trillion, two hundred eighty-one billion, four hundred million, six hundred ninety-two thousand, eight hundred sixteen".