2170458 has 48 divisors (see below), whose sum is σ = 5130216. Its totient is φ = 660480.

The previous prime is 2170453. The next prime is 2170477. The reversal of 2170458 is 8540712.

It can be written as a sum of positive squares in 4 ways, for example, as 1996569 + 173889 = 1413^2 + 417^2 .

It is not an unprimeable number, because it can be changed into a prime (2170453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12460 + ... + 12632.

2^2170458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2170458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2565108).

2170458 is an abundant number, since it is smaller than the sum of its proper divisors (2959758).

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

2170458 is a wasteful number, since it uses less digits than its factorization.

2170458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2170458 is about 1473.2474333933. The cubic root of 2170458 is about 129.4743667059.

It can be divided in two parts, 2170 and 458, that added together give a triangular number (2628 = T₇₂).

The spelling of 2170458 in words is "two million, one hundred seventy thousand, four hundred fifty-eight".