87851860 has 12 divisors (see below), whose sum is σ = 184488948. Its totient is φ = 35140736.

The previous prime is 87851843. The next prime is 87851867. The reversal of 87851860 is 6815878.

It can be written as a sum of positive squares in 2 ways, for example, as 65836996 + 22014864 = 8114^2 + 4692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87851867) 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, 2196277 + ... + 2196316.

It is an arithmetic number, because the mean of its divisors is an integer number (15374079).

Almost surely, 2^87851860 is an apocalyptic number.

It is an amenable number.

87851860 is an abundant number, since it is smaller than the sum of its proper divisors (96637088).

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

87851860 is a wasteful number, since it uses less digits than its factorization.

87851860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392602 (or 4392600 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 87851860 is about 9372.9323053141. The cubic root of 87851860 is about 444.5462867079.

The spelling of 87851860 in words is "eighty-seven million, eight hundred fifty-one thousand, eight hundred sixty".