4638889 has 4 divisors (see below), whose sum is σ = 4662400. Its totient is φ = 4615380.

The previous prime is 4638859. The next prime is 4638899. The reversal of 4638889 is 9888364.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4638889 - 2⁵ = 4638857 is a prime.

It is a Duffinian number.

4638889 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, 11457 + ... + 11854.

It is an arithmetic number, because the mean of its divisors is an integer number (1165600).

Almost surely, 2^4638889 is an apocalyptic number.

It is an amenable number.

4638889 is a deficient number, since it is larger than the sum of its proper divisors (23511).

4638889 is a wasteful number, since it uses less digits than its factorization.

4638889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23510.

The product of its digits is 331776, while the sum is 46.

The square root of 4638889 is about 2153.8080230141. The cubic root of 4638889 is about 166.7777051175. Note that the first 4 decimals are identical.

The spelling of 4638889 in words is "four million, six hundred thirty-eight thousand, eight hundred eighty-nine".