13393040 has 20 divisors (see below), whose sum is σ = 31139004. Its totient is φ = 5357184.

The previous prime is 13393033. The next prime is 13393049. The reversal of 13393040 is 4039331.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 3857296 = 3088^2 + 1964^2 .

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 = 13392997 and 13393015.

It is not an unprimeable number, because it can be changed into a prime (13393049) 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, 83627 + ... + 83786.

Almost surely, 2^13393040 is an apocalyptic number.

13393040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13393040 is an abundant number, since it is smaller than the sum of its proper divisors (17745964).

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

13393040 is a wasteful number, since it uses less digits than its factorization.

13393040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167426 (or 167420 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 13393040 is about 3659.6502565136. The cubic root of 13393040 is about 237.4796436847.

The spelling of 13393040 in words is "thirteen million, three hundred ninety-three thousand, forty".