2190342 has 48 divisors (see below), whose sum is σ = 5515776. Its totient is φ = 567600.

The previous prime is 2190337. The next prime is 2190347. The reversal of 2190342 is 2430912.

It is an interprime number because it is at equal distance from previous prime (2190337) and next prime (2190347).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190347) 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, 4867 + ... + 5297.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^2190342 is an apocalyptic number.

2190342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2190342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2757888).

2190342 is an abundant number, since it is smaller than the sum of its proper divisors (3325434).

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

2190342 is a wasteful number, since it uses less digits than its factorization.

2190342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2190342 is about 1479.9804052757. The cubic root of 2190342 is about 129.8685456208.

It can be divided in two parts, 21903 and 42, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 2190342 in words is "two million, one hundred ninety thousand, three hundred forty-two".