2002221988 has 24 divisors (see below), whose sum is σ = 3995385912. Its totient is φ = 869743104.

The previous prime is 2002221953. The next prime is 2002221997. The reversal of 2002221988 is 8891222002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 730729024 + 1271492964 = 27032^2 + 35658^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131595 + ... + 1133362.

It is an arithmetic number, because the mean of its divisors is an integer number (166474413).

Almost surely, 2^2002221988 is an apocalyptic number.

It is an amenable number.

2002221988 is a deficient number, since it is larger than the sum of its proper divisors (1993163924).

2002221988 is a wasteful number, since it uses less digits than its factorization.

2002221988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264991 (or 2264989 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 2002221988 is about 44746.1952349024. The cubic root of 2002221988 is about 1260.3874654515.

The spelling of 2002221988 in words is "two billion, two million, two hundred twenty-one thousand, nine hundred eighty-eight".