2163970 has 8 divisors (see below), whose sum is σ = 3895164. Its totient is φ = 865584.

The previous prime is 2163949. The next prime is 2163971. The reversal of 2163970 is 793612.

It can be written as a sum of positive squares in 2 ways, for example, as 2152089 + 11881 = 1467^2 + 109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2163971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108189 + ... + 108208.

2^2163970 is an apocalyptic number.

2163970 is a deficient number, since it is larger than the sum of its proper divisors (1731194).

2163970 is a wasteful number, since it uses less digits than its factorization.

2163970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216404.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 2163970 is about 1471.0438470691. The cubic root of 2163970 is about 129.3452283553.

It can be divided in two parts, 216 and 3970, that added together give a triangular number (4186 = T₉₁).

The spelling of 2163970 in words is "two million, one hundred sixty-three thousand, nine hundred seventy".