28531042426 has 12 divisors (see below), whose sum is σ = 43242342318. Its totient is φ = 14118444672.

The previous prime is 28531042411. The next prime is 28531042453. The reversal of 28531042426 is 62424013582.

It can be written as a sum of positive squares in 3 ways, for example, as 25652827225 + 2878215201 = 160165^2 + 53649^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 739261 + ... + 776896.

Almost surely, 2^28531042426 is an apocalyptic number.

28531042426 is a deficient number, since it is larger than the sum of its proper divisors (14711299892).

28531042426 is an equidigital number, since it uses as much as digits as its factorization.

28531042426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516353 (or 1516256 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 28531042426 in words is "twenty-eight billion, five hundred thirty-one million, forty-two thousand, four hundred twenty-six".