28638858000 has 80 divisors (see below), whose sum is σ = 92331697536. Its totient is φ = 7637027200.

The previous prime is 28638857959. The next prime is 28638858029. The reversal of 28638858000 is 85883682.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2380572 + ... + 2392571.

Almost surely, 2^28638858000 is an apocalyptic number.

28638858000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28638858000 is an abundant number, since it is smaller than the sum of its proper divisors (63692839536).

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

28638858000 is a wasteful number, since it uses less digits than its factorization.

28638858000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773169 (or 4773153 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 28638858000 in words is "twenty-eight billion, six hundred thirty-eight million, eight hundred fifty-eight thousand".