3123212240 has 40 divisors (see below), whose sum is σ = 7267034880. Its totient is φ = 1248327296.

The previous prime is 3123212233. The next prime is 3123212243. The reversal of 3123212240 is 422123213.

3123212240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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 (3123212243) 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, 95081 + ... + 123639.

It is an arithmetic number, because the mean of its divisors is an integer number (181675872).

Almost surely, 2^3123212240 is an apocalyptic number.

It is an amenable number.

3123212240 is an abundant number, since it is smaller than the sum of its proper divisors (4143822640).

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

3123212240 is a wasteful number, since it uses less digits than its factorization.

3123212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29939 (or 29933 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3123212240 is about 55885.7069383577. The cubic root of 3123212240 is about 1461.7300190204.

Adding to 3123212240 its reverse (422123213), we get a palindrome (3545335453).

The spelling of 3123212240 in words is "three billion, one hundred twenty-three million, two hundred twelve thousand, two hundred forty".