2189942 has 8 divisors (see below), whose sum is σ = 3291816. Its totient is φ = 1092672.

The previous prime is 2189939. The next prime is 2189981. The reversal of 2189942 is 2499812.

2189942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (411477).

2^2189942 is an apocalyptic number.

2189942 is a deficient number, since it is larger than the sum of its proper divisors (1101874).

2189942 is a wasteful number, since it uses less digits than its factorization.

2189942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302.

The product of its digits is 10368, while the sum is 35.

The square root of 2189942 is about 1479.8452621812. The cubic root of 2189942 is about 129.8606396133.

The spelling of 2189942 in words is "two million, one hundred eighty-nine thousand, nine hundred forty-two".