99857286 has 80 divisors (see below), whose sum is σ = 239928480. Its totient is φ = 30931200.

The previous prime is 99857279. The next prime is 99857287. The reversal of 99857286 is 68275899.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99857287) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 277975 + ... + 278333.

It is an arithmetic number, because the mean of its divisors is an integer number (2999106).

Almost surely, 2^99857286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99857286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119964240).

99857286 is an abundant number, since it is smaller than the sum of its proper divisors (140071194).

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

99857286 is a wasteful number, since it uses less digits than its factorization.

99857286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 482 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 99857286 is about 9992.8617522710. The cubic root of 99857286 is about 463.9379716677.

It can be divided in two parts, 9985 and 7286, that added together give a palindrome (17271).

The spelling of 99857286 in words is "ninety-nine million, eight hundred fifty-seven thousand, two hundred eighty-six".