99967820 has 24 divisors (see below), whose sum is σ = 222282144. Its totient is φ = 37634816.

The previous prime is 99967817. The next prime is 99967831. The reversal of 99967820 is 2876999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146672 + ... + 147351.

It is an arithmetic number, because the mean of its divisors is an integer number (9261756).

Almost surely, 2^99967820 is an apocalyptic number.

It is an amenable number.

99967820 is an abundant number, since it is smaller than the sum of its proper divisors (122314324).

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

99967820 is a wasteful number, since it uses less digits than its factorization.

99967820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294049 (or 294047 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 99967820 is about 9998.3908705351. The cubic root of 99967820 is about 464.1090892434.

The spelling of 99967820 in words is "ninety-nine million, nine hundred sixty-seven thousand, eight hundred twenty".