99689920 has 112 divisors (see below), whose sum is σ = 262176768. Its totient is φ = 35804160.

The previous prime is 99689917. The next prime is 99689923. The reversal of 99689920 is 2998699.

It is an interprime number because it is at equal distance from previous prime (99689917) and next prime (99689923).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99689923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446929 + ... + 447151.

It is an arithmetic number, because the mean of its divisors is an integer number (2340864).

Almost surely, 2^99689920 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 99689920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131088384).

99689920 is an abundant number, since it is smaller than the sum of its proper divisors (162486848).

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

99689920 is a wasteful number, since it uses less digits than its factorization.

99689920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 99689920 is about 9984.4839626292. The cubic root of 99689920 is about 463.6786320091.

The spelling of 99689920 in words is "ninety-nine million, six hundred eighty-nine thousand, nine hundred twenty".