13897040 has 20 divisors (see below), whose sum is σ = 32310804. Its totient is φ = 5558784.

The previous prime is 13897033. The next prime is 13897049. The reversal of 13897040 is 4079831.

It can be written as a sum of positive squares in 2 ways, for example, as 9265936 + 4631104 = 3044^2 + 2152^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 13896988 and 13897006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13897049) 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, 86777 + ... + 86936.

Almost surely, 2^13897040 is an apocalyptic number.

13897040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13897040 is an abundant number, since it is smaller than the sum of its proper divisors (18413764).

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

13897040 is a wasteful number, since it uses less digits than its factorization.

13897040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173726 (or 173720 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13897040 is about 3727.8733884079. The cubic root of 13897040 is about 240.4219429345.

The spelling of 13897040 in words is "thirteen million, eight hundred ninety-seven thousand, forty".