2175390 has 64 divisors (see below), whose sum is σ = 6635520. Its totient is φ = 496800.

The previous prime is 2175373. The next prime is 2175391. The reversal of 2175390 is 935712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2175391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1315 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (103680).

2^2175390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2175390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3317760).

2175390 is an abundant number, since it is smaller than the sum of its proper divisors (4460130).

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

2175390 is a wasteful number, since it uses less digits than its factorization.

2175390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 2175390 is about 1474.9203368318. The cubic root of 2175390 is about 129.5723620763.

The spelling of 2175390 in words is "two million, one hundred seventy-five thousand, three hundred ninety".