28020376485 has 12 divisors (see below), whose sum is σ = 48568652652. Its totient is φ = 14944200768.

The previous prime is 28020376469. The next prime is 28020376487. The reversal of 28020376485 is 58467302082.

28020376485 is a `hidden beast` number, since 2 + 80 + 20 + 3 + 76 + 485 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20106672804 + 7913703681 = 141798^2 + 88959^2 .

It is not a de Polignac number, because 28020376485 - 2⁴ = 28020376469 is a prime.

It is a super-2 number, since 2×28020376485² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 622675033 = 28020376485 / (2 + 8 + 0 + 2 + 0 + 3 + 7 + 6 + 4 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28020376485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28020376487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311337472 + ... + 311337561.

It is an arithmetic number, because the mean of its divisors is an integer number (4047387721).

Almost surely, 2^28020376485 is an apocalyptic number.

It is an amenable number.

28020376485 is a deficient number, since it is larger than the sum of its proper divisors (20548276167).

28020376485 is a wasteful number, since it uses less digits than its factorization.

28020376485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622675044 (or 622675041 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 28020376485 in words is "twenty-eight billion, twenty million, three hundred seventy-six thousand, four hundred eighty-five".