28318020645 has 16 divisors (see below), whose sum is σ = 45324738432. Its totient is φ = 15097642560.

The previous prime is 28318020637. The next prime is 28318020649. The reversal of 28318020645 is 54602081382.

It is not a de Polignac number, because 28318020645 - 2³ = 28318020637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318020649) 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, 287017 + ... + 372846.

It is an arithmetic number, because the mean of its divisors is an integer number (2832796152).

Almost surely, 2^28318020645 is an apocalyptic number.

It is an amenable number.

28318020645 is a deficient number, since it is larger than the sum of its proper divisors (17006717787).

28318020645 is a wasteful number, since it uses less digits than its factorization.

28318020645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662732.

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 28318020645 in words is "twenty-eight billion, three hundred eighteen million, twenty thousand, six hundred forty-five".