28357864634 has 16 divisors (see below), whose sum is σ = 47391094656. Its totient is φ = 12615684000.

The previous prime is 28357864541. The next prime is 28357864643. The reversal of 28357864634 is 43646875382.

It is a self number, because there is not a number n which added to its sum of digits gives 28357864634.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13711667 + ... + 13713734.

It is an arithmetic number, because the mean of its divisors is an integer number (2961943416).

Almost surely, 2^28357864634 is an apocalyptic number.

28357864634 is a deficient number, since it is larger than the sum of its proper divisors (19033230022).

28357864634 is a wasteful number, since it uses less digits than its factorization.

28357864634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27425461.

The product of its digits is 23224320, while the sum is 56.

The spelling of 28357864634 in words is "twenty-eight billion, three hundred fifty-seven million, eight hundred sixty-four thousand, six hundred thirty-four".