13981500 has 144 divisors (see below), whose sum is σ = 47698560. Its totient is φ = 3427200.

The previous prime is 13981477. The next prime is 13981501. The reversal of 13981500 is 518931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58381 + ... + 58619.

It is an arithmetic number, because the mean of its divisors is an integer number (331240).

Almost surely, 2^13981500 is an apocalyptic number.

13981500 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 13981500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23849280).

13981500 is an abundant number, since it is smaller than the sum of its proper divisors (33717060).

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

13981500 is a wasteful number, since it uses less digits than its factorization.

13981500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 13981500 is about 3739.1844030483. The cubic root of 13981500 is about 240.9080185935.

The spelling of 13981500 in words is "thirteen million, nine hundred eighty-one thousand, five hundred".