28861860427 has 2 divisors, whose sum is σ = 28861860428. Its totient is φ = 28861860426.

The previous prime is 28861860403. The next prime is 28861860481. The reversal of 28861860427 is 72406816882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28861860427 is a prime.

It is not a weakly prime, because it can be changed into another prime (28861860487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14430930213 + 14430930214.

It is an arithmetic number, because the mean of its divisors is an integer number (14430930214).

Almost surely, 2^28861860427 is an apocalyptic number.

28861860427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28861860427 is an equidigital number, since it uses as much as digits as its factorization.

28861860427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 28861860427 in words is "twenty-eight billion, eight hundred sixty-one million, eight hundred sixty thousand, four hundred twenty-seven".