13357840 has 20 divisors (see below), whose sum is σ = 31057164. Its totient is φ = 5343104.

The previous prime is 13357837. The next prime is 13357847. The reversal of 13357840 is 4875331.

It can be written as a sum of positive squares in 2 ways, for example, as 4309776 + 9048064 = 2076^2 + 3008^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (13357847) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 83407 + ... + 83566.

Almost surely, 2^13357840 is an apocalyptic number.

13357840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13357840 is an abundant number, since it is smaller than the sum of its proper divisors (17699324).

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

13357840 is a wasteful number, since it uses less digits than its factorization.

13357840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166986 (or 166980 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 13357840 is about 3654.8378897018. The cubic root of 13357840 is about 237.2714107133.

The spelling of 13357840 in words is "thirteen million, three hundred fifty-seven thousand, eight hundred forty".