2172308 has 24 divisors (see below), whose sum is σ = 4055520. Its totient is φ = 1015200.

The previous prime is 2172283. The next prime is 2172323. The reversal of 2172308 is 8032712.

It is a congruent number.

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, 7535 + ... + 7817.

It is an arithmetic number, because the mean of its divisors is an integer number (168980).

2^2172308 is an apocalyptic number.

It is an amenable number.

2172308 is a deficient number, since it is larger than the sum of its proper divisors (1883212).

2172308 is a wasteful number, since it uses less digits than its factorization.

2172308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2172308 is about 1473.8751643202. The cubic root of 2172308 is about 129.5111422860.

The spelling of 2172308 in words is "two million, one hundred seventy-two thousand, three hundred eight".