87218458 has 8 divisors (see below), whose sum is σ = 130867380. Its totient is φ = 43596000.

The previous prime is 87218419. The next prime is 87218473. The reversal of 87218458 is 85481278.

It can be written as a sum of positive squares in 2 ways, for example, as 87104889 + 113569 = 9333^2 + 337^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 8958 + ... + 15958.

Almost surely, 2^87218458 is an apocalyptic number.

87218458 is a deficient number, since it is larger than the sum of its proper divisors (43648922).

87218458 is a wasteful number, since it uses less digits than its factorization.

87218458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13232.

The product of its digits is 143360, while the sum is 43.

The square root of 87218458 is about 9339.0822889618. The cubic root of 87218458 is about 443.4753325570.

The spelling of 87218458 in words is "eighty-seven million, two hundred eighteen thousand, four hundred fifty-eight".