2172388 has 6 divisors (see below), whose sum is σ = 3801686. Its totient is φ = 1086192.

The previous prime is 2172383. The next prime is 2172389. The reversal of 2172388 is 8832712.

It can be written as a sum of positive squares in only one way, i.e., 1582564 + 589824 = 1258^2 + 768^2 .

It is not an unprimeable number, because it can be changed into a prime (2172383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271545 + ... + 271552.

2^2172388 is an apocalyptic number.

It is an amenable number.

2172388 is a deficient number, since it is larger than the sum of its proper divisors (1629298).

2172388 is a wasteful number, since it uses less digits than its factorization.

2172388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543101 (or 543099 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 2172388 is about 1473.9023034109. The cubic root of 2172388 is about 129.5127321103.

The spelling of 2172388 in words is "two million, one hundred seventy-two thousand, three hundred eighty-eight".