28387089630 has 64 divisors (see below), whose sum is σ = 75945703680. Its totient is φ = 7545210912.

The previous prime is 28387089623. The next prime is 28387089683. The reversal of 28387089630 is 3698078382.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88344 + ... + 254123.

It is an arithmetic number, because the mean of its divisors is an integer number (1186651620).

Almost surely, 2^28387089630 is an apocalyptic number.

28387089630 is an abundant number, since it is smaller than the sum of its proper divisors (47558614050).

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

28387089630 is a wasteful number, since it uses less digits than its factorization.

28387089630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342790 (or 342784 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 28387089630 in words is "twenty-eight billion, three hundred eighty-seven million, eighty-nine thousand, six hundred thirty".