13391128 has 16 divisors (see below), whose sum is σ = 25169760. Its totient is φ = 6679200.

The previous prime is 13391123. The next prime is 13391149. The reversal of 13391128 is 82119331.

It is a super-2 number, since 2×13391128² = 358644618224768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13391096 and 13391105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13391123) 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, 1873 + ... + 5503.

It is an arithmetic number, because the mean of its divisors is an integer number (1573110).

Almost surely, 2^13391128 is an apocalyptic number.

It is an amenable number.

13391128 is a deficient number, since it is larger than the sum of its proper divisors (11778632).

13391128 is a wasteful number, since it uses less digits than its factorization.

13391128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098 (or 4094 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 13391128 is about 3659.3890200415. The cubic root of 13391128 is about 237.4683422254.

The spelling of 13391128 in words is "thirteen million, three hundred ninety-one thousand, one hundred twenty-eight".