99638266 has 48 divisors (see below), whose sum is σ = 188656776. Its totient is φ = 39118464.

The previous prime is 99638243. The next prime is 99638269. The reversal of 99638266 is 66283699.

It can be written as a sum of positive squares in 4 ways, for example, as 96452041 + 3186225 = 9821^2 + 1785^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (99638269) 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 23 ways as a sum of consecutive naturals, for example, 250780 + ... + 251176.

Almost surely, 2^99638266 is an apocalyptic number.

99638266 is a deficient number, since it is larger than the sum of its proper divisors (89018510).

99638266 is a wasteful number, since it uses less digits than its factorization.

99638266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 616 counting only the distinct ones).

The product of its digits is 839808, while the sum is 49.

The square root of 99638266 is about 9981.8969139137. The cubic root of 99638266 is about 463.5985336603.

The spelling of 99638266 in words is "ninety-nine million, six hundred thirty-eight thousand, two hundred sixty-six".