28416626785 has 16 divisors (see below), whose sum is σ = 34295816016. Its totient is φ = 22603097088.

The previous prime is 28416626773. The next prime is 28416626789. The reversal of 28416626785 is 58762661482.

It can be written as a sum of positive squares in 8 ways, for example, as 6035269969 + 22381356816 = 77687^2 + 149604^2 .

It is a cyclic number.

It is not a de Polignac number, because 28416626785 - 2²⁹ = 27879755873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28416626789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598437 + ... + 644173.

It is an arithmetic number, because the mean of its divisors is an integer number (2143488501).

Almost surely, 2^28416626785 is an apocalyptic number.

It is an amenable number.

28416626785 is a deficient number, since it is larger than the sum of its proper divisors (5879189231).

28416626785 is a wasteful number, since it uses less digits than its factorization.

28416626785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46452.

The product of its digits is 7741440, while the sum is 55.

The spelling of 28416626785 in words is "twenty-eight billion, four hundred sixteen million, six hundred twenty-six thousand, seven hundred eighty-five".