4055639 has 16 divisors (see below), whose sum is σ = 4961088. Its totient is φ = 3236352.

The previous prime is 4055633. The next prime is 4055647. The reversal of 4055639 is 9365504.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-4055639 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 (4055633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20489 + ... + 20685.

It is an arithmetic number, because the mean of its divisors is an integer number (310068).

Almost surely, 2^4055639 is an apocalyptic number.

4055639 is a deficient number, since it is larger than the sum of its proper divisors (905449).

4055639 is a wasteful number, since it uses less digits than its factorization.

4055639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 4055639 is about 2013.8617132266. The cubic root of 4055639 is about 159.4727304723.

The spelling of 4055639 in words is "four million, fifty-five thousand, six hundred thirty-nine".