4390942 has 4 divisors (see below), whose sum is σ = 6586416. Its totient is φ = 2195470.

The previous prime is 4390937. The next prime is 4391003. The reversal of 4390942 is 2490934.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097734 + ... + 1097737.

It is an arithmetic number, because the mean of its divisors is an integer number (1646604).

Almost surely, 2^4390942 is an apocalyptic number.

4390942 is a deficient number, since it is larger than the sum of its proper divisors (2195474).

4390942 is a wasteful number, since it uses less digits than its factorization.

4390942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195473.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 4390942 is about 2095.4574679530. The cubic root of 4390942 is about 163.7517312328.

The spelling of 4390942 in words is "four million, three hundred ninety thousand, nine hundred forty-two".