13891628 has 12 divisors (see below), whose sum is σ = 24361680. Its totient is φ = 6931152.

The previous prime is 13891589. The next prime is 13891637. The reversal of 13891628 is 82619831.

It is a junction number, because it is equal to n+sod(n) for n = 13891591 and 13891600.

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, 1376 + ... + 5447.

It is an arithmetic number, because the mean of its divisors is an integer number (2030140).

Almost surely, 2^13891628 is an apocalyptic number.

It is an amenable number.

13891628 is a deficient number, since it is larger than the sum of its proper divisors (10470052).

13891628 is a wasteful number, since it uses less digits than its factorization.

13891628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7336 (or 7334 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 13891628 is about 3727.1474347012. The cubic root of 13891628 is about 240.3907292732.

The spelling of 13891628 in words is "thirteen million, eight hundred ninety-one thousand, six hundred twenty-eight".