13613428 has 12 divisors (see below), whose sum is σ = 23854180. Its totient is φ = 6797952.

The previous prime is 13613393. The next prime is 13613429. The reversal of 13613428 is 82431631.

It can be written as a sum of positive squares in 2 ways, for example, as 9972964 + 3640464 = 3158^2 + 1908^2 .

It is a super-2 number, since 2×13613428² = 370650843822368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13613396 and 13613405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613429) 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, 2350 + ... + 5722.

Almost surely, 2^13613428 is an apocalyptic number.

It is an amenable number.

13613428 is a deficient number, since it is larger than the sum of its proper divisors (10240752).

13613428 is a wasteful number, since it uses less digits than its factorization.

13613428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386 (or 4384 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 13613428 is about 3689.6379226152. The cubic root of 13613428 is about 238.7751718204.

It can be divided in two parts, 13613 and 428, that added together give a palindrome (14041).

The spelling of 13613428 in words is "thirteen million, six hundred thirteen thousand, four hundred twenty-eight".