28013051642 has 64 divisors (see below), whose sum is σ = 45185364000. Its totient is φ = 13000888320.

The previous prime is 28013051617. The next prime is 28013051669. The reversal of 28013051642 is 24615031082.

It is a Cunningham number, because it is equal to 167371²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 3282029521 + 24731022121 = 57289^2 + 157261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28013051599 and 28013051608.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61297478 + ... + 61297934.

Almost surely, 2^28013051642 is an apocalyptic number.

28013051642 is a deficient number, since it is larger than the sum of its proper divisors (17172312358).

28013051642 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (28013051641) it forms an eRAP, since the sums of their prime factors are consecutive (850 and 851).

28013051642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 28013051642 in words is "twenty-eight billion, thirteen million, fifty-one thousand, six hundred forty-two".