13750640 has 40 divisors (see below), whose sum is σ = 33078240. Its totient is φ = 5309696.

The previous prime is 13750609. The next prime is 13750657. The reversal of 13750640 is 4605731.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (826956).

Almost surely, 2^13750640 is an apocalyptic number.

13750640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13750640 is an abundant number, since it is smaller than the sum of its proper divisors (19327600).

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

13750640 is a wasteful number, since it uses less digits than its factorization.

13750640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969 (or 5963 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 13750640 is about 3708.1855401261. The cubic root of 13750640 is about 239.5747097757.

The spelling of 13750640 in words is "thirteen million, seven hundred fifty thousand, six hundred forty".