3123140220 has 192 divisors, whose sum is σ = 10049356800. Its totient is φ = 804798720.

The previous prime is 3123140213. The next prime is 3123140221. The reversal of 3123140220 is 220413213.

3123140220 is a `hidden beast` number, since 31 + 231 + 402 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3123140193 and 3123140202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123140221) 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, 1942657 + ... + 1944263.

It is an arithmetic number, because the mean of its divisors is an integer number (52340400).

Almost surely, 2^3123140220 is an apocalyptic number.

3123140220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3123140220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5024678400).

3123140220 is an abundant number, since it is smaller than the sum of its proper divisors (6926216580).

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

3123140220 is a wasteful number, since it uses less digits than its factorization.

3123140220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3123140220 is about 55885.0625838426. The cubic root of 3123140220 is about 1461.7187833014.

Adding to 3123140220 its reverse (220413213), we get a palindrome (3343553433).

The spelling of 3123140220 in words is "three billion, one hundred twenty-three million, one hundred forty thousand, two hundred twenty".