13920030 has 24 divisors (see below), whose sum is σ = 36192312. Its totient is φ = 3711984.

The previous prime is 13920019. The next prime is 13920031. The reversal of 13920030 is 3002931.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13919985 and 13920012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920031) 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, 77244 + ... + 77423.

It is an arithmetic number, because the mean of its divisors is an integer number (1508013).

Almost surely, 2^13920030 is an apocalyptic number.

13920030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13920030 is an abundant number, since it is smaller than the sum of its proper divisors (22272282).

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

13920030 is a wasteful number, since it uses less digits than its factorization.

13920030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154680 (or 154677 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 13920030 is about 3730.9556416554. The cubic root of 13920030 is about 240.5544472978.

Adding to 13920030 its reverse (3002931), we get a palindrome (16922961).

The spelling of 13920030 in words is "thirteen million, nine hundred twenty thousand, thirty".