13140240 has 40 divisors (see below), whose sum is σ = 40735488. Its totient is φ = 3504000.

The previous prime is 13140221. The next prime is 13140271. The reversal of 13140240 is 4204131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27136 + ... + 27615.

Almost surely, 2^13140240 is an apocalyptic number.

13140240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140240 is an abundant number, since it is smaller than the sum of its proper divisors (27595248).

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

13140240 is a wasteful number, since it uses less digits than its factorization.

13140240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54767 (or 54761 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 13140240 is about 3624.9468961628. The cubic root of 13140240 is about 235.9759623128.

Adding to 13140240 its reverse (4204131), we get a palindrome (17344371).

The spelling of 13140240 in words is "thirteen million, one hundred forty thousand, two hundred forty".