13538228 has 12 divisors (see below), whose sum is σ = 25845792. Its totient is φ = 6153720.

The previous prime is 13538197. The next prime is 13538233. The reversal of 13538228 is 82283531.

It is a junction number, because it is equal to n+sod(n) for n = 13538194 and 13538203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153800 + ... + 153887.

It is an arithmetic number, because the mean of its divisors is an integer number (2153816).

Almost surely, 2^13538228 is an apocalyptic number.

It is an amenable number.

13538228 is a deficient number, since it is larger than the sum of its proper divisors (12307564).

13538228 is a wasteful number, since it uses less digits than its factorization.

13538228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307702 (or 307700 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 13538228 is about 3679.4331085101. The cubic root of 13538228 is about 238.3346984561.

The spelling of 13538228 in words is "thirteen million, five hundred thirty-eight thousand, two hundred twenty-eight".