611322140 has 192 divisors, whose sum is σ = 1592680320. Its totient is φ = 194088960.

The previous prime is 611322133. The next prime is 611322149. The reversal of 611322140 is 41223116.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611322149) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5608406 + ... + 5608514.

It is an arithmetic number, because the mean of its divisors is an integer number (8295210).

Almost surely, 2^611322140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611322140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796340160).

611322140 is an abundant number, since it is smaller than the sum of its proper divisors (981358180).

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

611322140 is a wasteful number, since it uses less digits than its factorization.

611322140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 611322140 is about 24724.9295246721. The cubic root of 611322140 is about 848.7048973844.

Adding to 611322140 its reverse (41223116), we get a palindrome (652545256).

The spelling of 611322140 in words is "six hundred eleven million, three hundred twenty-two thousand, one hundred forty".