87212860 has 48 divisors (see below), whose sum is σ = 216538560. Its totient is φ = 28869120.

The previous prime is 87212843. The next prime is 87212861. The reversal of 87212860 is 6821278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87212861) 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 15 ways as a sum of consecutive naturals, for example, 6681 + ... + 14800.

It is an arithmetic number, because the mean of its divisors is an integer number (4511220).

Almost surely, 2^87212860 is an apocalyptic number.

It is an amenable number.

87212860 is an abundant number, since it is smaller than the sum of its proper divisors (129325700).

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

87212860 is a wasteful number, since it uses less digits than its factorization.

87212860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21526 (or 21524 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 87212860 is about 9338.7825759036. The cubic root of 87212860 is about 443.4658443971.

The spelling of 87212860 in words is "eighty-seven million, two hundred twelve thousand, eight hundred sixty".