14399820 has 36 divisors (see below), whose sum is σ = 43680000. Its totient is φ = 3839904.

The previous prime is 14399783. The next prime is 14399821. The reversal of 14399820 is 2899341.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (14399821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39820 + ... + 40179.

Almost surely, 2^14399820 is an apocalyptic number.

14399820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14399820 is an abundant number, since it is smaller than the sum of its proper divisors (29280180).

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

14399820 is a wasteful number, since it uses less digits than its factorization.

14399820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80014 (or 80009 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 14399820 is about 3794.7094750455. The cubic root of 14399820 is about 243.2870661184.

The spelling of 14399820 in words is "fourteen million, three hundred ninety-nine thousand, eight hundred twenty".