13987830 has 16 divisors (see below), whose sum is σ = 33570864. Its totient is φ = 3730080.

The previous prime is 13987807. The next prime is 13987843. The reversal of 13987830 is 3878931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233101 + ... + 233160.

It is an arithmetic number, because the mean of its divisors is an integer number (2098179).

Almost surely, 2^13987830 is an apocalyptic number.

13987830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13987830 is an abundant number, since it is smaller than the sum of its proper divisors (19583034).

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

13987830 is a wasteful number, since it uses less digits than its factorization.

13987830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466271.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13987830 is about 3740.0307485367. The cubic root of 13987830 is about 240.9443694304.

The spelling of 13987830 in words is "thirteen million, nine hundred eighty-seven thousand, eight hundred thirty".