99640422 has 48 divisors (see below), whose sum is σ = 257580720. Its totient is φ = 28467936.

The previous prime is 99640403. The next prime is 99640441. The reversal of 99640422 is 22404699.

99640422 is a `hidden beast` number, since 9 + 9 + 640 + 4 + 2 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (99640403) and next prime (99640441).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16183 + ... + 21474.

It is an arithmetic number, because the mean of its divisors is an integer number (5366265).

Almost surely, 2^99640422 is an apocalyptic number.

99640422 is an abundant number, since it is smaller than the sum of its proper divisors (157940298).

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

99640422 is a wasteful number, since it uses less digits than its factorization.

99640422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37682 (or 37669 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 99640422 is about 9982.0049088347. The cubic root of 99640422 is about 463.6018774601.

The spelling of 99640422 in words is "ninety-nine million, six hundred forty thousand, four hundred twenty-two".