28005389626 has 4 divisors (see below), whose sum is σ = 42008084442. Its totient is φ = 14002694812.

The previous prime is 28005389617. The next prime is 28005389647. The reversal of 28005389626 is 62698350082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14448280401 + 13557109225 = 120201^2 + 116435^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28005389626.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7001347405 + ... + 7001347408.

Almost surely, 2^28005389626 is an apocalyptic number.

28005389626 is a deficient number, since it is larger than the sum of its proper divisors (14002694816).

28005389626 is a wasteful number, since it uses less digits than its factorization.

28005389626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14002694815.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 28005389626 in words is "twenty-eight billion, five million, three hundred eighty-nine thousand, six hundred twenty-six".