3111223440 has 160 divisors (see below), whose sum is σ = 10667817216. Its totient is φ = 745113600.

The previous prime is 3111223439. The next prime is 3111223469. The reversal of 3111223440 is 443221113.

It is a super-2 number, since 2×3111223440² = 19359422587210867200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101965 + ... + 128915.

Almost surely, 2^3111223440 is an apocalyptic number.

3111223440 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 3111223440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5333908608).

3111223440 is an abundant number, since it is smaller than the sum of its proper divisors (7556593776).

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

3111223440 is a wasteful number, since it uses less digits than its factorization.

3111223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27017 (or 27011 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3111223440 is about 55778.3420334452. The cubic root of 3111223440 is about 1459.8572826030.

Adding to 3111223440 its reverse (443221113), we get a palindrome (3554444553).

The spelling of 3111223440 in words is "three billion, one hundred eleven million, two hundred twenty-three thousand, four hundred forty".