2163988 has 12 divisors (see below), whose sum is σ = 3811360. Its totient is φ = 1075032.

The previous prime is 2163983. The next prime is 2164003. The reversal of 2163988 is 8893612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008 + ... + 2311.

2^2163988 is an apocalyptic number.

It is an amenable number.

2163988 is a deficient number, since it is larger than the sum of its proper divisors (1647372).

2163988 is a wasteful number, since it uses less digits than its factorization.

2163988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486 (or 3484 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 2163988 is about 1471.0499651609. The cubic root of 2163988 is about 129.3455869875.

It can be divided in two parts, 21 and 63988, that added together give a square (64009 = 253²).

The spelling of 2163988 in words is "two million, one hundred sixty-three thousand, nine hundred eighty-eight".