611620 has 24 divisors (see below), whose sum is σ = 1310904. Its totient is φ = 239616.

The previous prime is 611603. The next prime is 611621. The reversal of 611620 is 26116.

It can be written as a sum of positive squares in 4 ways, for example, as 306916 + 304704 = 554^2 + 552^2 .

It is a junction number, because it is equal to n+sod(n) for n = 611594 and 611603.

It is not an unprimeable number, because it can be changed into a prime (611621) 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, 772 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (54621).

2⁶¹¹⁶²⁰ is an apocalyptic number.

It is an amenable number.

611620 is an abundant number, since it is smaller than the sum of its proper divisors (699284).

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

611620 is a wasteful number, since it uses less digits than its factorization.

611620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 611620 is about 782.0613786654. The cubic root of 611620 is about 84.8842715717.

Adding to 611620 its reverse (26116), we get a palindrome (637736).

It can be divided in two parts, 61 and 1620, that added together give a square (1681 = 41²).

The spelling of 611620 in words is "six hundred eleven thousand, six hundred twenty".