13920210 has 24 divisors (see below), whose sum is σ = 36192780. Its totient is φ = 3712032.

The previous prime is 13920199. The next prime is 13920211. The reversal of 13920210 is 1202931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13638249 + 281961 = 3693^2 + 531^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13920211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77245 + ... + 77424.

Almost surely, 2^13920210 is an apocalyptic number.

13920210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13920210 is an abundant number, since it is smaller than the sum of its proper divisors (22272570).

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

13920210 is a wasteful number, since it uses less digits than its factorization.

13920210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154682 (or 154679 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 13920210 is about 3730.9797640834. The cubic root of 13920210 is about 240.5554841637. Note that the first 3 decimals are identical.

The spelling of 13920210 in words is "thirteen million, nine hundred twenty thousand, two hundred ten".