13631140 has 12 divisors (see below), whose sum is σ = 28625436. Its totient is φ = 5452448.

The previous prime is 13631117. The next prime is 13631143. The reversal of 13631140 is 4113631.

It can be written as a sum of positive squares in 2 ways, for example, as 1617984 + 12013156 = 1272^2 + 3466^2 .

It is not an unprimeable number, because it can be changed into a prime (13631143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340759 + ... + 340798.

It is an arithmetic number, because the mean of its divisors is an integer number (2385453).

Almost surely, 2^13631140 is an apocalyptic number.

13631140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13631140 is an abundant number, since it is smaller than the sum of its proper divisors (14994296).

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

13631140 is a wasteful number, since it uses less digits than its factorization.

13631140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681566 (or 681564 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 13631140 is about 3692.0373779256. The cubic root of 13631140 is about 238.8786812136.

Adding to 13631140 its reverse (4113631), we get a palindrome (17744771).

The spelling of 13631140 in words is "thirteen million, six hundred thirty-one thousand, one hundred forty".