13903920 has 160 divisors (see below), whose sum is σ = 49371840. Its totient is φ = 3594240.

The previous prime is 13903889. The next prime is 13903949. The reversal of 13903920 is 2930931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88482 + ... + 88638.

It is an arithmetic number, because the mean of its divisors is an integer number (308574).

Almost surely, 2^13903920 is an apocalyptic number.

13903920 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 13903920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24685920).

13903920 is an abundant number, since it is smaller than the sum of its proper divisors (35467920).

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

13903920 is a wasteful number, since it uses less digits than its factorization.

13903920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 13903920 is about 3728.7960523472. The cubic root of 13903920 is about 240.4616115756.

The spelling of 13903920 in words is "thirteen million, nine hundred three thousand, nine hundred twenty".