13628431 has 4 divisors (see below), whose sum is σ = 13676872. Its totient is φ = 13579992.

The previous prime is 13628413. The next prime is 13628467. The reversal of 13628431 is 13482631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13482631 = 1259 ⋅10709.

It is a cyclic number.

It is not a de Polignac number, because 13628431 - 2⁹ = 13627919 is a prime.

It is a super-2 number, since 2×13628431² = 371468263043522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13628431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13628411) 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, 23796 + ... + 24361.

It is an arithmetic number, because the mean of its divisors is an integer number (3419218).

Almost surely, 2^13628431 is an apocalyptic number.

13628431 is a deficient number, since it is larger than the sum of its proper divisors (48441).

13628431 is an equidigital number, since it uses as much as digits as its factorization.

13628431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48440.

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

The square root of 13628431 is about 3691.6704890876. The cubic root of 13628431 is about 238.8628555570.

The spelling of 13628431 in words is "thirteen million, six hundred twenty-eight thousand, four hundred thirty-one".