28637773560 has 896 divisors, whose sum is σ = 114833203200. Its totient is φ = 6348948480.

The previous prime is 28637773559. The next prime is 28637773561. The reversal of 28637773560 is 6537773682.

28637773560 is a `hidden beast` number, since 2 + 8 + 6 + 3 + 7 + 7 + 73 + 560 = 666.

It is an interprime number because it is at equal distance from previous prime (28637773559) and next prime (28637773561).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 28637773497 and 28637773506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28637773561) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 225494217 + ... + 225494343.

Almost surely, 2^28637773560 is an apocalyptic number.

28637773560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28637773560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57416601600).

28637773560 is an abundant number, since it is smaller than the sum of its proper divisors (86195429640).

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

28637773560 is a wasteful number, since it uses less digits than its factorization.

28637773560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 28637773560 in words is "twenty-eight billion, six hundred thirty-seven million, seven hundred seventy-three thousand, five hundred sixty".