10131440 has 80 divisors (see below), whose sum is σ = 26650080. Its totient is φ = 3548160.

The previous prime is 10131419. The next prime is 10131463. The reversal of 10131440 is 4413101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25322 + ... + 25718.

It is an arithmetic number, because the mean of its divisors is an integer number (333126).

Almost surely, 2^10131440 is an apocalyptic number.

10131440 is a gapful number since it is divisible by the number (10) 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 10131440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13325040).

10131440 is an abundant number, since it is smaller than the sum of its proper divisors (16518640).

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

10131440 is a wasteful number, since it uses less digits than its factorization.

10131440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 10131440 is about 3182.9923028496. The cubic root of 10131440 is about 216.3832929224.

Adding to 10131440 its reverse (4413101), we get a palindrome (14544541).

The spelling of 10131440 in words is "ten million, one hundred thirty-one thousand, four hundred forty".