4022639 has 4 divisors (see below), whose sum is σ = 4028640. Its totient is φ = 4016640.

The previous prime is 4022611. The next prime is 4022657. The reversal of 4022639 is 9362204.

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

It is a cyclic number.

It is not a de Polignac number, because 4022639 - 2⁸ = 4022383 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 (4022339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847 + ... + 3384.

It is an arithmetic number, because the mean of its divisors is an integer number (1007160).

Almost surely, 2^4022639 is an apocalyptic number.

4022639 is a deficient number, since it is larger than the sum of its proper divisors (6001).

4022639 is an equidigital number, since it uses as much as digits as its factorization.

4022639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 4022639 is about 2005.6517643898. The cubic root of 4022639 is about 159.0390184162.

The spelling of 4022639 in words is "four million, twenty-two thousand, six hundred thirty-nine".