28212502842 has 24 divisors (see below), whose sum is σ = 61146697716. Its totient is φ = 9401150976.

The previous prime is 28212502753. The next prime is 28212502861. The reversal of 28212502842 is 24820521282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27945474561 + 267028281 = 167169^2 + 16341^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28212502797 and 28212502806.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193353 + ... + 306284.

Almost surely, 2^28212502842 is an apocalyptic number.

28212502842 is an abundant number, since it is smaller than the sum of its proper divisors (32934194874).

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

28212502842 is a wasteful number, since it uses less digits than its factorization.

28212502842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502782 (or 502779 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The spelling of 28212502842 in words is "twenty-eight billion, two hundred twelve million, five hundred two thousand, eight hundred forty-two".