99987238 has 8 divisors (see below), whose sum is σ = 161517888. Its totient is φ = 46147944.

The previous prime is 99987221. The next prime is 99987257. The reversal of 99987238 is 83278999.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1922806 + ... + 1922857.

It is an arithmetic number, because the mean of its divisors is an integer number (20189736).

Almost surely, 2^99987238 is an apocalyptic number.

99987238 is a deficient number, since it is larger than the sum of its proper divisors (61530650).

99987238 is a wasteful number, since it uses less digits than its factorization.

99987238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845678.

The product of its digits is 1959552, while the sum is 55.

The square root of 99987238 is about 9999.3618796401. The cubic root of 99987238 is about 464.1391372024.

The spelling of 99987238 in words is "ninety-nine million, nine hundred eighty-seven thousand, two hundred thirty-eight".