87220206 has 32 divisors (see below), whose sum is σ = 194718720. Its totient is φ = 28939032.

The previous prime is 87220153. The next prime is 87220247. The reversal of 87220206 is 60202278.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 87220206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8421 + ... + 15663.

It is an arithmetic number, because the mean of its divisors is an integer number (6084960).

Almost surely, 2^87220206 is an apocalyptic number.

87220206 is an abundant number, since it is smaller than the sum of its proper divisors (107498514).

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

87220206 is a wasteful number, since it uses less digits than its factorization.

87220206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477 (or 7471 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 87220206 is about 9339.1758737053. The cubic root of 87220206 is about 443.4782951933.

The spelling of 87220206 in words is "eighty-seven million, two hundred twenty thousand, two hundred six".