87223860 has 36 divisors (see below), whose sum is σ = 264579588. Its totient is φ = 23259648.

The previous prime is 87223859. The next prime is 87223867. The reversal of 87223860 is 6832278.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45077796 + 42146064 = 6714^2 + 6492^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (87223867) 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, 242109 + ... + 242468.

It is an arithmetic number, because the mean of its divisors is an integer number (7349433).

Almost surely, 2^87223860 is an apocalyptic number.

It is an amenable number.

87223860 is an abundant number, since it is smaller than the sum of its proper divisors (177355728).

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

87223860 is a wasteful number, since it uses less digits than its factorization.

87223860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484592 (or 484587 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 87223860 is about 9339.3714991963. The cubic root of 87223860 is about 443.4844881278.

The spelling of 87223860 in words is "eighty-seven million, two hundred twenty-three thousand, eight hundred sixty".