13947830 has 32 divisors (see below), whose sum is σ = 27917568. Its totient is φ = 4982400.

The previous prime is 13947827. The next prime is 13947839. The reversal of 13947830 is 3874931.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13947839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2300 + ... + 5760.

It is an arithmetic number, because the mean of its divisors is an integer number (872424).

Almost surely, 2^13947830 is an apocalyptic number.

13947830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13947830 is an abundant number, since it is smaller than the sum of its proper divisors (13969738).

13947830 is a wasteful number, since it uses less digits than its factorization.

13947830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13947830 is about 3734.6793704413. The cubic root of 13947830 is about 240.7144796805.

The spelling of 13947830 in words is "thirteen million, nine hundred forty-seven thousand, eight hundred thirty".