841231440 has 640 divisors, whose sum is σ = 3599769600. Its totient is φ = 176394240.

The previous prime is 841231411. The next prime is 841231453. The reversal of 841231440 is 44132148.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14258131 + ... + 14258189.

It is an arithmetic number, because the mean of its divisors is an integer number (5624640).

Almost surely, 2^841231440 is an apocalyptic number.

841231440 is a gapful number since it is divisible by the number (80) 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 841231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799884800).

841231440 is an abundant number, since it is smaller than the sum of its proper divisors (2758538160).

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

841231440 is a wasteful number, since it uses less digits than its factorization.

841231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 841231440 is about 29003.9900703334. The cubic root of 841231440 is about 943.9996468925. Note that the first 3 decimals are identical.

Adding to 841231440 its reverse (44132148), we get a palindrome (885363588).

The spelling of 841231440 in words is "eight hundred forty-one million, two hundred thirty-one thousand, four hundred forty".