28959834880 has 72 divisors (see below), whose sum is σ = 71242777872. Its totient is φ = 11270836224.

The previous prime is 28959834863. The next prime is 28959834889. The reversal of 28959834880 is 8843895982.

It is a super-2 number, since 2×28959834880² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (28959834889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258382 + ... + 353101.

It is an arithmetic number, because the mean of its divisors is an integer number (989483026).

Almost surely, 2^28959834880 is an apocalyptic number.

28959834880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28959834880 is an abundant number, since it is smaller than the sum of its proper divisors (42282942992).

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

28959834880 is an equidigital number, since it uses as much as digits as its factorization.

28959834880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611541 (or 611527 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 28959834880 in words is "twenty-eight billion, nine hundred fifty-nine million, eight hundred thirty-four thousand, eight hundred eighty".