2172384 has 72 divisors (see below), whose sum is σ = 6519240. Its totient is φ = 684288.

The previous prime is 2172383. The next prime is 2172389. The reversal of 2172384 is 4832712.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 5274 + ... + 5670.

It is an arithmetic number, because the mean of its divisors is an integer number (90545).

2^2172384 is an apocalyptic number.

2172384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2172384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3259620).

2172384 is an abundant number, since it is smaller than the sum of its proper divisors (4346856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172384 is a wasteful number, since it uses less digits than its factorization.

2172384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 421 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2172384 is about 1473.9009464682. The cubic root of 2172384 is about 129.5126526200.

It can be divided in two parts, 2172 and 384, that added together give a triangular number (2556 = T₇₁).

The spelling of 2172384 in words is "two million, one hundred seventy-two thousand, three hundred eighty-four".