7212183440 has 160 divisors (see below), whose sum is σ = 20947230720. Its totient is φ = 2243520000.

The previous prime is 7212183413. The next prime is 7212183467. The reversal of 7212183440 is 443812127.

It is an interprime number because it is at equal distance from previous prime (7212183413) and next prime (7212183467).

It is a junction number, because it is equal to n+sod(n) for n = 7212183397 and 7212183406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4625381 + ... + 4626939.

It is an arithmetic number, because the mean of its divisors is an integer number (130920192).

Almost surely, 2^7212183440 is an apocalyptic number.

7212183440 is a gapful number since it is divisible by the number (70) 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 7212183440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10473615360).

7212183440 is an abundant number, since it is smaller than the sum of its proper divisors (13735047280).

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

7212183440 is a wasteful number, since it uses less digits than its factorization.

7212183440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 7212183440 is about 84924.5750062960. The cubic root of 7212183440 is about 1932.0673204455.

Adding to 7212183440 its reverse (443812127), we get a palindrome (7655995567).

The spelling of 7212183440 in words is "seven billion, two hundred twelve million, one hundred eighty-three thousand, four hundred forty".