99678020 has 96 divisors (see below), whose sum is σ = 237081600. Its totient is φ = 34951680.

The previous prime is 99677983. The next prime is 99678053. The reversal of 99678020 is 2087699.

It is a super-2 number, since 2×99678020² = 19871415342240800, which contains 22 as substring.

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, 668906 + ... + 669054.

It is an arithmetic number, because the mean of its divisors is an integer number (2469600).

Almost surely, 2^99678020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99678020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118540800).

99678020 is an abundant number, since it is smaller than the sum of its proper divisors (137403580).

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

99678020 is a wasteful number, since it uses less digits than its factorization.

99678020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 99678020 is about 9983.8880202054. Note that the first 3 decimals coincide. The cubic root of 99678020 is about 463.6601814800.

The spelling of 99678020 in words is "ninety-nine million, six hundred seventy-eight thousand, twenty".