28085617630 has 48 divisors (see below), whose sum is σ = 61364731680. Its totient is φ = 9210683328.

The previous prime is 28085617591. The next prime is 28085617631. The reversal of 28085617630 is 3671658082.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28085617631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234765 + ... + 1257304.

It is an arithmetic number, because the mean of its divisors is an integer number (1278431910).

Almost surely, 2^28085617630 is an apocalyptic number.

28085617630 is an abundant number, since it is smaller than the sum of its proper divisors (33279114050).

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

28085617630 is a wasteful number, since it uses less digits than its factorization.

28085617630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492113 (or 2492106 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 28085617630 in words is "twenty-eight billion, eighty-five million, six hundred seventeen thousand, six hundred thirty".