99820828440 has 128 divisors (see below), whose sum is σ = 332816256000. Its totient is φ = 26612475264.

The previous prime is 99820828427. The next prime is 99820828477. The reversal of 99820828440 is 4482802899.

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, 5952147 + ... + 5968893.

It is an arithmetic number, because the mean of its divisors is an integer number (2600127000).

Almost surely, 2^99820828440 is an apocalyptic number.

99820828440 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99820828440 is an abundant number, since it is smaller than the sum of its proper divisors (232995427560).

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

99820828440 is a wasteful number, since it uses less digits than its factorization.

99820828440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22286 (or 22276 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 99820828440 in words is "ninety-nine billion, eight hundred twenty million, eight hundred twenty-eight thousand, four hundred forty".