4638906 has 12 divisors (see below), whose sum is σ = 10051002. Its totient is φ = 1546296.

The previous prime is 4638899. The next prime is 4638911. The reversal of 4638906 is 6098364.

It can be written as a sum of positive squares in only one way, i.e., 2692881 + 1946025 = 1641^2 + 1395^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128841 + ... + 128876.

Almost surely, 2^4638906 is an apocalyptic number.

4638906 is an abundant number, since it is smaller than the sum of its proper divisors (5412096).

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

4638906 is a wasteful number, since it uses less digits than its factorization.

4638906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257725 (or 257722 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 4638906 is about 2153.8119695089. The cubic root of 4638906 is about 166.7779088457. Note that the first 3 decimals are identical.

The spelling of 4638906 in words is "four million, six hundred thirty-eight thousand, nine hundred six".