312030202440 has 128 divisors (see below), whose sum is σ = 1021579776000. Its totient is φ = 75614795520.

The previous prime is 312030202399. The next prime is 312030202457. The reversal of 312030202440 is 44202030213.

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, 3518889 + ... + 3606471.

It is an arithmetic number, because the mean of its divisors is an integer number (7981092000).

Almost surely, 2^312030202440 is an apocalyptic number.

312030202440 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 312030202440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510789888000).

312030202440 is an abundant number, since it is smaller than the sum of its proper divisors (709549573560).

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

312030202440 is a wasteful number, since it uses less digits than its factorization.

312030202440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90307 (or 90303 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 312030202440 its reverse (44202030213), we get a palindrome (356232232653).

The spelling of 312030202440 in words is "three hundred twelve billion, thirty million, two hundred two thousand, four hundred forty".