99897856 has 40 divisors (see below), whose sum is σ = 203045040. Its totient is φ = 49087488.

The previous prime is 99897773. The next prime is 99897881. The reversal of 99897856 is 65879899.

It is a junction number, because it is equal to n+sod(n) for n = 99897794 and 99897803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28555 + ... + 31861.

It is an arithmetic number, because the mean of its divisors is an integer number (5076126).

Almost surely, 2^99897856 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 99897856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101522520).

99897856 is an abundant number, since it is smaller than the sum of its proper divisors (103147184).

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

99897856 is an equidigital number, since it uses as much as digits as its factorization.

99897856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384 (or 3368 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 61.

The square root of 99897856 is about 9994.8914951589. The cubic root of 99897856 is about 464.0007927057. Note that the first 3 decimals are identical.

The spelling of 99897856 in words is "ninety-nine million, eight hundred ninety-seven thousand, eight hundred fifty-six".