4638819 has 4 divisors (see below), whose sum is σ = 6185096. Its totient is φ = 3092544.

The previous prime is 4638791. The next prime is 4638827. The reversal of 4638819 is 9188364.

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

It is not a de Polignac number, because 4638819 - 2⁷ = 4638691 is a prime.

It is a super-2 number, since 2×4638819² = 43037283429522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

4638819 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4638859) 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, 773134 + ... + 773139.

It is an arithmetic number, because the mean of its divisors is an integer number (1546274).

Almost surely, 2^4638819 is an apocalyptic number.

4638819 is a deficient number, since it is larger than the sum of its proper divisors (1546277).

4638819 is a wasteful number, since it uses less digits than its factorization.

4638819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546276.

The product of its digits is 41472, while the sum is 39.

The square root of 4638819 is about 2153.7917726651. The cubic root of 4638819 is about 166.7768662314.

The spelling of 4638819 in words is "four million, six hundred thirty-eight thousand, eight hundred nineteen".