28061293786 has 8 divisors (see below), whose sum is σ = 42096201300. Its totient is φ = 14029226688.

The previous prime is 28061293783. The next prime is 28061293801. The reversal of 28061293786 is 68739216082.

It can be written as a sum of positive squares in 2 ways, for example, as 27828578761 + 232715025 = 166819^2 + 15255^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28061293783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685231 + ... + 725026.

Almost surely, 2^28061293786 is an apocalyptic number.

28061293786 is a deficient number, since it is larger than the sum of its proper divisors (14034907514).

28061293786 is a wasteful number, since it uses less digits than its factorization.

28061293786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420208.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 28061293786 in words is "twenty-eight billion, sixty-one million, two hundred ninety-three thousand, seven hundred eighty-six".