4638645 has 24 divisors (see below), whose sum is σ = 8772192. Its totient is φ = 2248800.

The previous prime is 4638631. The next prime is 4638659. The reversal of 4638645 is 5468364.

4638645 is a `hidden beast` number, since 4 + 6 + 3 + 8 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (4638631) and next prime (4638659).

It is not a de Polignac number, because 4638645 - 2⁴ = 4638629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4191 + ... + 5180.

It is an arithmetic number, because the mean of its divisors is an integer number (365508).

Almost surely, 2^4638645 is an apocalyptic number.

4638645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4638645 is a deficient number, since it is larger than the sum of its proper divisors (4133547).

4638645 is a wasteful number, since it uses less digits than its factorization.

4638645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9393 (or 9390 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 4638645 is about 2153.7513784093. The cubic root of 4638645 is about 166.7747809637.

The spelling of 4638645 in words is "four million, six hundred thirty-eight thousand, six hundred forty-five".