87318720 has 84 divisors (see below), whose sum is σ = 300349920. Its totient is φ = 23284224.

The previous prime is 87318713. The next prime is 87318727. The reversal of 87318720 is 2781378.

It is an interprime number because it is at equal distance from previous prime (87318713) and next prime (87318727).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87318727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12280 + ... + 18039.

Almost surely, 2^87318720 is an apocalyptic number.

87318720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87318720 is an abundant number, since it is smaller than the sum of its proper divisors (213031200).

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

87318720 is a wasteful number, since it uses less digits than its factorization.

87318720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30342 (or 30329 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 87318720 is about 9344.4486193675. The cubic root of 87318720 is about 443.6451998761.

The spelling of 87318720 in words is "eighty-seven million, three hundred eighteen thousand, seven hundred twenty".