99867638 has 8 divisors (see below), whose sum is σ = 161324688. Its totient is φ = 46092744.

The previous prime is 99867631. The next prime is 99867659. The reversal of 99867638 is 83676899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99867631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1920506 + ... + 1920557.

It is an arithmetic number, because the mean of its divisors is an integer number (20165586).

Almost surely, 2^99867638 is an apocalyptic number.

99867638 is a deficient number, since it is larger than the sum of its proper divisors (61457050).

99867638 is a wasteful number, since it uses less digits than its factorization.

99867638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841078.

The product of its digits is 3919104, while the sum is 56.

The square root of 99867638 is about 9993.3797085871. The cubic root of 99867638 is about 463.9540029463.

The spelling of 99867638 in words is "ninety-nine million, eight hundred sixty-seven thousand, six hundred thirty-eight".