545638 has 8 divisors (see below), whose sum is σ = 824400. Its totient is φ = 270840.

The previous prime is 545621. The next prime is 545641. The reversal of 545638 is 836545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (103050).

2⁵⁴⁵⁶³⁸ is an apocalyptic number.

545638 is a deficient number, since it is larger than the sum of its proper divisors (278762).

545638 is a wasteful number, since it uses less digits than its factorization.

545638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982.

The product of its digits is 14400, while the sum is 31.

The square root of 545638 is about 738.6731347491. The cubic root of 545638 is about 81.7149531649.

The spelling of 545638 in words is "five hundred forty-five thousand, six hundred thirty-eight".