8489942 has 4 divisors (see below), whose sum is σ = 12734916. Its totient is φ = 4244970.

The previous prime is 8489933. The next prime is 8489947. The reversal of 8489942 is 2499848.

It is a happy number.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8489893 and 8489902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8489947) by changing a digit.

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 as a sum of consecutive naturals, namely, 2122484 + ... + 2122487.

It is an arithmetic number, because the mean of its divisors is an integer number (3183729).

Almost surely, 2^8489942 is an apocalyptic number.

8489942 is a deficient number, since it is larger than the sum of its proper divisors (4244974).

8489942 is a wasteful number, since it uses less digits than its factorization.

8489942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244973.

The product of its digits is 165888, while the sum is 44.

The square root of 8489942 is about 2913.7505040755. The cubic root of 8489942 is about 204.0022266834.

The spelling of 8489942 in words is "eight million, four hundred eighty-nine thousand, nine hundred forty-two".