14021780 has 12 divisors (see below), whose sum is σ = 29445780. Its totient is φ = 5608704.

The previous prime is 14021759. The next prime is 14021783. The reversal of 14021780 is 8712041.

It can be written as a sum of positive squares in 2 ways, for example, as 8271376 + 5750404 = 2876^2 + 2398^2 .

It is a super-2 number, since 2×14021780² = 393220628736800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14021783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350525 + ... + 350564.

It is an arithmetic number, because the mean of its divisors is an integer number (2453815).

Almost surely, 2^14021780 is an apocalyptic number.

14021780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14021780 is an abundant number, since it is smaller than the sum of its proper divisors (15424000).

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

14021780 is a wasteful number, since it uses less digits than its factorization.

14021780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701098 (or 701096 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 14021780 is about 3744.5667306112. The cubic root of 14021780 is about 241.1391447525.

The spelling of 14021780 in words is "fourteen million, twenty-one thousand, seven hundred eighty".