6331440 has 160 divisors (see below), whose sum is σ = 21712896. Its totient is φ = 1520640.

The previous prime is 6331439. The next prime is 6331447. The reversal of 6331440 is 441336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6331447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171102 + ... + 171138.

Almost surely, 2^6331440 is an apocalyptic number.

6331440 is a gapful number since it is divisible by the number (60) 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 6331440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10856448).

6331440 is an abundant number, since it is smaller than the sum of its proper divisors (15381456).

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

6331440 is a wasteful number, since it uses less digits than its factorization.

6331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 6331440 is about 2516.2352831164. The cubic root of 6331440 is about 184.9981981806.

Adding to 6331440 its sum of digits (21), we get a triangular number (6331461 = T₃₅₅₈).

Adding to 6331440 its reverse (441336), we get a palindrome (6772776).

The spelling of 6331440 in words is "six million, three hundred thirty-one thousand, four hundred forty".