28794774645 has 256 divisors, whose sum is σ = 67182796800. Its totient is φ = 11503689984.

The previous prime is 28794774611. The next prime is 28794774647. The reversal of 28794774645 is 54647749782.

28794774645 is a `hidden beast` number, since 2 + 87 + 9 + 477 + 46 + 45 = 666.

It is not a de Polignac number, because 28794774645 - 2²⁰ = 28793726069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28794774647) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 18905854 + ... + 18907376.

It is an arithmetic number, because the mean of its divisors is an integer number (262432800).

Almost surely, 2^28794774645 is an apocalyptic number.

It is an amenable number.

28794774645 is an abundant number, since it is smaller than the sum of its proper divisors (38388022155).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28794774645 is a wasteful number, since it uses less digits than its factorization.

28794774645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1570 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 63.

The spelling of 28794774645 in words is "twenty-eight billion, seven hundred ninety-four million, seven hundred seventy-four thousand, six hundred forty-five".