13331428 has 24 divisors (see below), whose sum is σ = 25873344. Its totient is φ = 5959200.

The previous prime is 13331411. The next prime is 13331429. The reversal of 13331428 is 82413331.

It is not an unprimeable number, because it can be changed into a prime (13331429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (1078056).

Almost surely, 2^13331428 is an apocalyptic number.

It is an amenable number.

13331428 is a deficient number, since it is larger than the sum of its proper divisors (12541916).

13331428 is a wasteful number, since it uses less digits than its factorization.

13331428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043 (or 5041 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 13331428 is about 3651.2228088683. Note that the first 3 decimals coincide. The cubic root of 13331428 is about 237.1149246490.

Adding to 13331428 its reverse (82413331), we get a palindrome (95744759).

The spelling of 13331428 in words is "thirteen million, three hundred thirty-one thousand, four hundred twenty-eight".