99628287 has 16 divisors (see below), whose sum is σ = 147650688. Its totient is φ = 59240480.

The previous prime is 99628273. The next prime is 99628307. The reversal of 99628287 is 78282699.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99628287 - 2⁴ = 99628271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99628247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26733 + ... + 30230.

It is an arithmetic number, because the mean of its divisors is an integer number (9228168).

Almost surely, 2^99628287 is an apocalyptic number.

99628287 is a deficient number, since it is larger than the sum of its proper divisors (48022401).

99628287 is a wasteful number, since it uses less digits than its factorization.

99628287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57030.

The product of its digits is 870912, while the sum is 51.

The square root of 99628287 is about 9981.3970465061. The cubic root of 99628287 is about 463.5830563261.

The spelling of 99628287 in words is "ninety-nine million, six hundred twenty-eight thousand, two hundred eighty-seven".