14221780 has 12 divisors (see below), whose sum is σ = 29865780. Its totient is φ = 5688704.

The previous prime is 14221771. The next prime is 14221799. The reversal of 14221780 is 8712241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6370576 + 7851204 = 2524^2 + 2802^2 .

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, 355525 + ... + 355564.

It is an arithmetic number, because the mean of its divisors is an integer number (2488815).

Almost surely, 2^14221780 is an apocalyptic number.

14221780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14221780 is an abundant number, since it is smaller than the sum of its proper divisors (15644000).

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

14221780 is a wasteful number, since it uses less digits than its factorization.

14221780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711098 (or 711096 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 14221780 is about 3771.1775349352. The cubic root of 14221780 is about 242.2802345252.

The spelling of 14221780 in words is "fourteen million, two hundred twenty-one thousand, seven hundred eighty".