87786212 has 12 divisors (see below), whose sum is σ = 153931260. Its totient is φ = 43805856.

The previous prime is 87786211. The next prime is 87786217. The reversal of 87786212 is 21268778.

It can be written as a sum of positive squares in 2 ways, for example, as 55591936 + 32194276 = 7456^2 + 5674^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87786212.

It is not an unprimeable number, because it can be changed into a prime (87786211) 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 3 ways as a sum of consecutive naturals, for example, 19523 + ... + 23594.

It is an arithmetic number, because the mean of its divisors is an integer number (12827605).

Almost surely, 2^87786212 is an apocalyptic number.

It is an amenable number.

87786212 is a deficient number, since it is larger than the sum of its proper divisors (66145048).

87786212 is a wasteful number, since it uses less digits than its factorization.

87786212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43630 (or 43628 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 87786212 is about 9369.4296517984. The cubic root of 87786212 is about 444.4355288675.

The spelling of 87786212 in words is "eighty-seven million, seven hundred eighty-six thousand, two hundred twelve".