87218902 has 8 divisors (see below), whose sum is σ = 131291496. Its totient is φ = 43455072.

The previous prime is 87218899. The next prime is 87218909. The reversal of 87218902 is 20981278.

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 (87218909) 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, 76483 + ... + 77614.

It is an arithmetic number, because the mean of its divisors is an integer number (16411437).

Almost surely, 2^87218902 is an apocalyptic number.

87218902 is a deficient number, since it is larger than the sum of its proper divisors (44072594).

87218902 is a wasteful number, since it uses less digits than its factorization.

87218902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154382.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 87218902 is about 9339.1060600038. The cubic root of 87218902 is about 443.4760850840.

The spelling of 87218902 in words is "eighty-seven million, two hundred eighteen thousand, nine hundred two".