461638 has 4 divisors (see below), whose sum is σ = 692460. Its totient is φ = 230818.

The previous prime is 461627. The next prime is 461639. The reversal of 461638 is 836164.

461638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115408 + ... + 115411.

It is an arithmetic number, because the mean of its divisors is an integer number (173115).

2⁴⁶¹⁶³⁸ is an apocalyptic number.

461638 is a deficient number, since it is larger than the sum of its proper divisors (230822).

461638 is a wasteful number, since it uses less digits than its factorization.

461638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230821.

The product of its digits is 3456, while the sum is 28.

The square root of 461638 is about 679.4394748614. The cubic root of 461638 is about 77.2859441794.

The spelling of 461638 in words is "four hundred sixty-one thousand, six hundred thirty-eight".