1220100186 has 16 divisors (see below), whose sum is σ = 2440589184. Its totient is φ = 406635264.

The previous prime is 1220100157. The next prime is 1220100187. The reversal of 1220100186 is 6810010221.

It is not an unprimeable number, because it can be changed into a prime (1220100187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39135 + ... + 63021.

It is an arithmetic number, because the mean of its divisors is an integer number (152536824).

Almost surely, 2^1220100186 is an apocalyptic number.

1220100186 is an abundant number, since it is smaller than the sum of its proper divisors (1220488998).

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

1220100186 is a wasteful number, since it uses less digits than its factorization.

1220100186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32405.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1220100186 is about 34929.9325221221. The cubic root of 1220100186 is about 1068.5589784520.

The spelling of 1220100186 in words is "one billion, two hundred twenty million, one hundred thousand, one hundred eighty-six".