8140442 has 4 divisors (see below), whose sum is σ = 12210666. Its totient is φ = 4070220.

The previous prime is 8140441. The next prime is 8140519. The reversal of 8140442 is 2440418.

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

It can be written as a sum of positive squares in only one way, i.e., 5480281 + 2660161 = 2341^2 + 1631^2 .

It is not an unprimeable number, because it can be changed into a prime (8140441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2035109 + ... + 2035112.

Almost surely, 2^8140442 is an apocalyptic number.

8140442 is a deficient number, since it is larger than the sum of its proper divisors (4070224).

8140442 is a wasteful number, since it uses less digits than its factorization.

8140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070223.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 8140442 is about 2853.1459829458. The cubic root of 8140442 is about 201.1635674264.

The spelling of 8140442 in words is "eight million, one hundred forty thousand, four hundred forty-two".