13899618 has 24 divisors (see below), whose sum is σ = 30201600. Its totient is φ = 4620024.

The previous prime is 13899617. The next prime is 13899629. The reversal of 13899618 is 81699831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7023 + ... + 8781.

It is an arithmetic number, because the mean of its divisors is an integer number (1258400).

Almost surely, 2^13899618 is an apocalyptic number.

13899618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13899618 is an abundant number, since it is smaller than the sum of its proper divisors (16301982).

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

13899618 is a wasteful number, since it uses less digits than its factorization.

13899618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 2203 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 13899618 is about 3728.2191459194. The cubic root of 13899618 is about 240.4368086768.

The spelling of 13899618 in words is "thirteen million, eight hundred ninety-nine thousand, six hundred eighteen".