28281400692829 has 8 divisors (see below), whose sum is σ = 28309443435000. Its totient is φ = 28253358624000.

The previous prime is 28281400692821. The next prime is 28281400692889. The reversal of 28281400692829 is 92829600418282.

It can be written as a sum of positive squares in 4 ways, for example, as 5718425690329 + 22562975002500 = 2391323^2 + 4750050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28281400692829 - 2³ = 28281400692821 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149225529 + ... + 149414929.

It is an arithmetic number, because the mean of its divisors is an integer number (3538680429375).

Almost surely, 2^{28281400692829} is an apocalyptic number.

It is an amenable number.

28281400692829 is a deficient number, since it is larger than the sum of its proper divisors (28042742171).

28281400692829 is a wasteful number, since it uses less digits than its factorization.

28281400692829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336671.

The product of its (nonzero) digits is 15925248, while the sum is 61.

The spelling of 28281400692829 in words is "twenty-eight trillion, two hundred eighty-one billion, four hundred million, six hundred ninety-two thousand, eight hundred twenty-nine".