220133988 has 18 divisors (see below), whose sum is σ = 556449894. Its totient is φ = 73377984.

The previous prime is 220133987. The next prime is 220134001. The reversal of 220133988 is 889331022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 117679104 + 102454884 = 10848^2 + 10122^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6114833 = 220133988 / (2 + 2 + 0 + 1 + 3 + 3 + 9 + 8 + 8).

It is not an unprimeable number, because it can be changed into a prime (220133987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3057381 + ... + 3057452.

It is an arithmetic number, because the mean of its divisors is an integer number (30913883).

Almost surely, 2^220133988 is an apocalyptic number.

It is an amenable number.

220133988 is an abundant number, since it is smaller than the sum of its proper divisors (336315906).

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

220133988 is a wasteful number, since it uses less digits than its factorization.

220133988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114843 (or 6114838 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 220133988 is about 14836.9130212454. The cubic root of 220133988 is about 603.8036033834.

The spelling of 220133988 in words is "two hundred twenty million, one hundred thirty-three thousand, nine hundred eighty-eight".