28257790426 has 16 divisors (see below), whose sum is σ = 43089920640. Its totient is φ = 13894573680.

The previous prime is 28257790411. The next prime is 28257790493. The reversal of 28257790426 is 62409775282.

It is a super-2 number, since 2×28257790426² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703555 + ... + 742633.

It is an arithmetic number, because the mean of its divisors is an integer number (2693120040).

Almost surely, 2^28257790426 is an apocalyptic number.

28257790426 is a deficient number, since it is larger than the sum of its proper divisors (14832130214).

28257790426 is a wasteful number, since it uses less digits than its factorization.

28257790426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45069.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 28257790426 in words is "twenty-eight billion, two hundred fifty-seven million, seven hundred ninety thousand, four hundred twenty-six".