13750000 has 80 divisors (see below), whose sum is σ = 36328032. Its totient is φ = 5000000.

The previous prime is 13749997. The next prime is 13750043. The reversal of 13750000 is 5731.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1249995 + ... + 1250005.

Almost surely, 2^13750000 is an apocalyptic number.

13750000 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 13750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18164016).

13750000 is an abundant number, since it is smaller than the sum of its proper divisors (22578032).

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

13750000 is an frugal number, since it uses more digits than its factorization.

13750000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 16.

The square root of 13750000 is about 3708.0992435478. The cubic root of 13750000 is about 239.5709928531.

Adding to 13750000 its reverse (5731), we get a palindrome (13755731).

The spelling of 13750000 in words is "thirteen million, seven hundred fifty thousand".