13981432 has 16 divisors (see below), whose sum is σ = 26316000. Its totient is φ = 6963840.

The previous prime is 13981427. The next prime is 13981441. The reversal of 13981432 is 23418931.

It is a junction number, because it is equal to n+sod(n) for n = 13981394 and 13981403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057 + ... + 5392.

It is an arithmetic number, because the mean of its divisors is an integer number (1644750).

Almost surely, 2^13981432 is an apocalyptic number.

It is an amenable number.

13981432 is a deficient number, since it is larger than the sum of its proper divisors (12334568).

13981432 is a wasteful number, since it uses less digits than its factorization.

13981432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726 (or 6722 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 13981432 is about 3739.1753101453. The cubic root of 13981432 is about 240.9076280352.

The spelling of 13981432 in words is "thirteen million, nine hundred eighty-one thousand, four hundred thirty-two".