14399988 has 12 divisors (see below), whose sum is σ = 33600000. Its totient is φ = 4799992.

The previous prime is 14399981. The next prime is 14399999. The reversal of 14399988 is 88999341.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 14399988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14399981) 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, 599988 + ... + 600011.

It is an arithmetic number, because the mean of its divisors is an integer number (2800000).

Almost surely, 2^14399988 is an apocalyptic number.

It is an amenable number.

14399988 is an abundant number, since it is smaller than the sum of its proper divisors (19200012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

14399988 is a wasteful number, since it uses less digits than its factorization.

14399988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200006 (or 1200004 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 14399988 is about 3794.7316110629. The cubic root of 14399988 is about 243.2880122429.

The spelling of 14399988 in words is "fourteen million, three hundred ninety-nine thousand, nine hundred eighty-eight".