611920 has 20 divisors (see below), whose sum is σ = 1422900. Its totient is φ = 244736.

The previous prime is 611903. The next prime is 611921. The reversal of 611920 is 29116.

It can be written as a sum of positive squares in 2 ways, for example, as 104976 + 506944 = 324^2 + 712^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3745 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (71145).

2⁶¹¹⁹²⁰ is an apocalyptic number.

It is an amenable number.

611920 is an abundant number, since it is smaller than the sum of its proper divisors (810980).

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

611920 is a wasteful number, since it uses less digits than its factorization.

611920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662 (or 7656 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 611920 is about 782.2531559540. The cubic root of 611920 is about 84.8981478996.

The spelling of 611920 in words is "six hundred eleven thousand, nine hundred twenty".