87217238 has 8 divisors (see below), whose sum is σ = 130977000. Its totient is φ = 43558240.

The previous prime is 87217231. The next prime is 87217243. The reversal of 87217238 is 83271278.

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 (87217231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22988 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (16372125).

Almost surely, 2^87217238 is an apocalyptic number.

87217238 is a deficient number, since it is larger than the sum of its proper divisors (43759762).

87217238 is a wasteful number, since it uses less digits than its factorization.

87217238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50382.

The product of its digits is 37632, while the sum is 38.

The square root of 87217238 is about 9339.0169718231. The cubic root of 87217238 is about 443.4732647897.

The spelling of 87217238 in words is "eighty-seven million, two hundred seventeen thousand, two hundred thirty-eight".