611860820 has 12 divisors (see below), whose sum is σ = 1284907764. Its totient is φ = 244744320.

The previous prime is 611860801. The next prime is 611860829. The reversal of 611860820 is 28068116.

It can be written as a sum of positive squares in 2 ways, for example, as 366875716 + 244985104 = 19154^2 + 15652^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611860829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15296501 + ... + 15296540.

It is an arithmetic number, because the mean of its divisors is an integer number (107075647).

Almost surely, 2^611860820 is an apocalyptic number.

It is an amenable number.

611860820 is an abundant number, since it is smaller than the sum of its proper divisors (673046944).

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

611860820 is a wasteful number, since it uses less digits than its factorization.

611860820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30593050 (or 30593048 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 611860820 is about 24735.8205847310. The cubic root of 611860820 is about 848.9541092184.

The spelling of 611860820 in words is "six hundred eleven million, eight hundred sixty thousand, eight hundred twenty".