4638390 has 16 divisors (see below), whose sum is σ = 11132208. Its totient is φ = 1236896.

The previous prime is 4638377. The next prime is 4638397. The reversal of 4638390 is 938364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4638397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77277 + ... + 77336.

It is an arithmetic number, because the mean of its divisors is an integer number (695763).

Almost surely, 2^4638390 is an apocalyptic number.

4638390 is an abundant number, since it is smaller than the sum of its proper divisors (6493818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4638390 is a wasteful number, since it uses less digits than its factorization.

4638390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154623.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 4638390 is about 2153.6921785622. The cubic root of 4638390 is about 166.7717248738.

The spelling of 4638390 in words is "four million, six hundred thirty-eight thousand, three hundred ninety".