13920285 has 16 divisors (see below), whose sum is σ = 22409856. Its totient is φ = 7378368.

The previous prime is 13920259. The next prime is 13920287. The reversal of 13920285 is 58202931.

It is a happy number.

It is not a de Polignac number, because 13920285 - 2⁷ = 13920157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920287) 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 15 ways as a sum of consecutive naturals, for example, 274 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (1400616).

Almost surely, 2^13920285 is an apocalyptic number.

13920285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13920285 is a deficient number, since it is larger than the sum of its proper divisors (8489571).

13920285 is a wasteful number, since it uses less digits than its factorization.

13920285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13920285 is about 3730.9898150491. The cubic root of 13920285 is about 240.5559161885. Note that the first 3 decimals are identical.

The spelling of 13920285 in words is "thirteen million, nine hundred twenty thousand, two hundred eighty-five".