13905920 has 104 divisors (see below), whose sum is σ = 38530464. Its totient is φ = 4718592.

The previous prime is 13905919. The next prime is 13905943. The reversal of 13905920 is 2950931.

It is a super-2 number, since 2×13905920² = 386749222092800, which contains 22 as substring.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143312 + ... + 143408.

Almost surely, 2^13905920 is an apocalyptic number.

13905920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13905920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19265232).

13905920 is an abundant number, since it is smaller than the sum of its proper divisors (24624544).

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

13905920 is an frugal number, since it uses more digits than its factorization.

13905920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 13905920 is about 3729.0642257810. The cubic root of 13905920 is about 240.4731407023.

The spelling of 13905920 in words is "thirteen million, nine hundred five thousand, nine hundred twenty".