87218460 has 72 divisors (see below), whose sum is σ = 302361696. Its totient is φ = 19935360.

The previous prime is 87218419. The next prime is 87218473. The reversal of 87218460 is 6481278.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 33351 + ... + 35870.

It is an arithmetic number, because the mean of its divisors is an integer number (4199468).

Almost surely, 2^87218460 is an apocalyptic number.

It is an amenable number.

87218460 is an abundant number, since it is smaller than the sum of its proper divisors (215143236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87218460 is a wasteful number, since it uses less digits than its factorization.

87218460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69243 (or 69238 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 87218460 is about 9339.0823960387. The cubic root of 87218460 is about 443.4753359468.

It can be divided in two parts, 87218 and 460, that added together give a palindrome (87678).

The spelling of 87218460 in words is "eighty-seven million, two hundred eighteen thousand, four hundred sixty".