8042639 has 8 divisors (see below), whose sum is σ = 8831568. Its totient is φ = 7263360.

The previous prime is 8042633. The next prime is 8042641. The reversal of 8042639 is 9362408.

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

It is a cyclic number.

It is not a de Polignac number, because 8042639 - 2⁴ = 8042623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8042633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602 + ... + 4055.

It is an arithmetic number, because the mean of its divisors is an integer number (1103946).

Almost surely, 2^8042639 is an apocalyptic number.

8042639 is a deficient number, since it is larger than the sum of its proper divisors (788929).

8042639 is a wasteful number, since it uses less digits than its factorization.

8042639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 8042639 is about 2835.9546893418. The cubic root of 8042639 is about 200.3546955834.

It can be divided in two parts, 804 and 2639, that added together give a palindrome (3443).

The spelling of 8042639 in words is "eight million, forty-two thousand, six hundred thirty-nine".