13040428 has 48 divisors (see below), whose sum is σ = 25510464. Its totient is φ = 5806080.

The previous prime is 13040381. The next prime is 13040449. The reversal of 13040428 is 82404031.

It is a junction number, because it is equal to n+sod(n) for n = 13040399 and 13040408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178600 + ... + 178672.

It is an arithmetic number, because the mean of its divisors is an integer number (531468).

Almost surely, 2^13040428 is an apocalyptic number.

It is an amenable number.

13040428 is a deficient number, since it is larger than the sum of its proper divisors (12470036).

13040428 is a wasteful number, since it uses less digits than its factorization.

13040428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 13040428 is about 3611.1532783863. The cubic root of 13040428 is about 235.3769595112.

Adding to 13040428 its reverse (82404031), we get a palindrome (95444459).

The spelling of 13040428 in words is "thirteen million, forty thousand, four hundred twenty-eight".