4268639 has 4 divisors (see below), whose sum is σ = 4454256. Its totient is φ = 4083024.

The previous prime is 4268623. The next prime is 4268647. The reversal of 4268639 is 9368624.

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 4268639 - 2⁴ = 4268623 is a prime.

It is a super-3 number, since 3×4268639³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4268609) 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, 92774 + ... + 92819.

It is an arithmetic number, because the mean of its divisors is an integer number (1113564).

Almost surely, 2^4268639 is an apocalyptic number.

4268639 is a deficient number, since it is larger than the sum of its proper divisors (185617).

4268639 is a wasteful number, since it uses less digits than its factorization.

4268639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185616.

The product of its digits is 62208, while the sum is 38.

The square root of 4268639 is about 2066.0684887002. The cubic root of 4268639 is about 162.2170413023.

The spelling of 4268639 in words is "four million, two hundred sixty-eight thousand, six hundred thirty-nine".