611538 has 16 divisors (see below), whose sum is σ = 1231200. Its totient is φ = 202496.

The previous prime is 611531. The next prime is 611543. The reversal of 611538 is 835116.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (611531) 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, 1138 + ... + 1586.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2⁶¹¹⁵³⁸ is an apocalyptic number.

611538 is an abundant number, since it is smaller than the sum of its proper divisors (619662).

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

611538 is a wasteful number, since it uses less digits than its factorization.

611538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its digits is 720, while the sum is 24.

The square root of 611538 is about 782.0089513554. The cubic root of 611538 is about 84.8804779192.

The spelling of 611538 in words is "six hundred eleven thousand, five hundred thirty-eight".