13750040 has 32 divisors (see below), whose sum is σ = 31132080. Its totient is φ = 5465472.

The previous prime is 13749997. The next prime is 13750043. The reversal of 13750040 is 4005731.

It is a happy number.

13750040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13749994 and 13750021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13750043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5927 + ... + 7913.

Almost surely, 2^13750040 is an apocalyptic number.

13750040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13750040 is an abundant number, since it is smaller than the sum of its proper divisors (17382040).

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

13750040 is a wasteful number, since it uses less digits than its factorization.

13750040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 13750040 is about 3708.1046371428. The cubic root of 13750040 is about 239.5712251642.

Adding to 13750040 its reverse (4005731), we get a palindrome (17755771).

The spelling of 13750040 in words is "thirteen million, seven hundred fifty thousand, forty".