13980447 has 36 divisors (see below), whose sum is σ = 23021544. Its totient is φ = 8125920.

The previous prime is 13980433. The next prime is 13980457. The reversal of 13980447 is 74408931.

It is a happy number.

13980447 is a `hidden beast` number, since 139 + 80 + 447 = 666.

It is not a de Polignac number, because 13980447 - 2¹² = 13976351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13980427) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42072 + ... + 42402.

Almost surely, 2^13980447 is an apocalyptic number.

13980447 is a deficient number, since it is larger than the sum of its proper divisors (9041097).

13980447 is a wasteful number, since it uses less digits than its factorization.

13980447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13980447 is about 3739.0435942899. The cubic root of 13980447 is about 240.9019705416.

The spelling of 13980447 in words is "thirteen million, nine hundred eighty thousand, four hundred forty-seven".