99871056 has 120 divisors (see below), whose sum is σ = 307105344. Its totient is φ = 31311360.

The previous prime is 99871043. The next prime is 99871061. The reversal of 99871056 is 65017899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65341 + ... + 66851.

Almost surely, 2^99871056 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 99871056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153552672).

99871056 is an abundant number, since it is smaller than the sum of its proper divisors (207234288).

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

99871056 is a wasteful number, since it uses less digits than its factorization.

99871056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 99871056 is about 9993.5507203396. The cubic root of 99871056 is about 463.9592958745.

The spelling of 99871056 in words is "ninety-nine million, eight hundred seventy-one thousand, fifty-six".