28794774644 has 6 divisors (see below), whose sum is σ = 50390855634. Its totient is φ = 14397387320.

The previous prime is 28794774611. The next prime is 28794774647. The reversal of 28794774644 is 44647749782.

It can be written as a sum of positive squares in only one way, i.e., 22085526544 + 6709248100 = 148612^2 + 81910^2 .

It is a super-3 number, since 3×28794774644³ (a number of 32 digits) contains 333 as substring.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3599346827 + ... + 3599346834.

It is an arithmetic number, because the mean of its divisors is an integer number (8398475939).

Almost surely, 2^28794774644 is an apocalyptic number.

It is an amenable number.

28794774644 is a deficient number, since it is larger than the sum of its proper divisors (21596080990).

28794774644 is a wasteful number, since it uses less digits than its factorization.

28794774644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7198693665 (or 7198693663 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 62.

The spelling of 28794774644 in words is "twenty-eight billion, seven hundred ninety-four million, seven hundred seventy-four thousand, six hundred forty-four".