2169730 has 8 divisors (see below), whose sum is σ = 3905532. Its totient is φ = 867888.

The previous prime is 2169707. The next prime is 2169749. The reversal of 2169730 is 379612.

It is a Cunningham number, because it is equal to 1473²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 2169729 + 1 = 1473^2 + 1^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108477 + ... + 108496.

2^2169730 is an apocalyptic number.

2169730 is a deficient number, since it is larger than the sum of its proper divisors (1735802).

2169730 is a wasteful number, since it uses less digits than its factorization.

2169730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216980.

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

The square root of 2169730 is about 1473.0003394433. Note that the first 3 decimals coincide. The cubic root of 2169730 is about 129.4598892884.

It can be divided in two parts, 21 and 69730, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 2169730 in words is "two million, one hundred sixty-nine thousand, seven hundred thirty".