28315961858 has 16 divisors (see below), whose sum is σ = 45152087040. Its totient is φ = 13280022000.

The previous prime is 28315961857. The next prime is 28315961887. The reversal of 28315961858 is 85816951382.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28315961857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3685058 + ... + 3692733.

It is an arithmetic number, because the mean of its divisors is an integer number (2822005440).

Almost surely, 2^28315961858 is an apocalyptic number.

28315961858 is a deficient number, since it is larger than the sum of its proper divisors (16836125182).

28315961858 is a wasteful number, since it uses less digits than its factorization.

28315961858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377913.

The product of its digits is 4147200, while the sum is 56.

The spelling of 28315961858 in words is "twenty-eight billion, three hundred fifteen million, nine hundred sixty-one thousand, eight hundred fifty-eight".