87863860 has 36 divisors (see below), whose sum is σ = 214641252. Its totient is φ = 30124416.

The previous prime is 87863843. The next prime is 87863869. The reversal of 87863860 is 6836878.

It can be written as a sum of positive squares in 2 ways, for example, as 66389904 + 21473956 = 8148^2 + 4634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87863860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87863869) 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 11 ways as a sum of consecutive naturals, for example, 43849 + ... + 45808.

It is an arithmetic number, because the mean of its divisors is an integer number (5962257).

Almost surely, 2^87863860 is an apocalyptic number.

It is an amenable number.

87863860 is an abundant number, since it is smaller than the sum of its proper divisors (126777392).

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

87863860 is a wasteful number, since it uses less digits than its factorization.

87863860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89680 (or 89671 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 87863860 is about 9373.5724246415. The cubic root of 87863860 is about 444.5665265092.

The spelling of 87863860 in words is "eighty-seven million, eight hundred sixty-three thousand, eight hundred sixty".