13929890 has 32 divisors (see below), whose sum is σ = 27349056. Its totient is φ = 5077440.

The previous prime is 13929887. The next prime is 13929913. The reversal of 13929890 is 9892931.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10145 + ... + 11435.

It is an arithmetic number, because the mean of its divisors is an integer number (854658).

Almost surely, 2^13929890 is an apocalyptic number.

13929890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13929890 is a deficient number, since it is larger than the sum of its proper divisors (13419166).

13929890 is a wasteful number, since it uses less digits than its factorization.

13929890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 13929890 is about 3732.2767850201. The cubic root of 13929890 is about 240.6112313480.

The spelling of 13929890 in words is "thirteen million, nine hundred twenty-nine thousand, eight hundred ninety".