13645340 has 24 divisors (see below), whose sum is σ = 28724640. Its totient is φ = 5444928.

The previous prime is 13645321. The next prime is 13645351. The reversal of 13645340 is 4354631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16046 + ... + 16874.

It is an arithmetic number, because the mean of its divisors is an integer number (1196860).

Almost surely, 2^13645340 is an apocalyptic number.

13645340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13645340 is an abundant number, since it is smaller than the sum of its proper divisors (15079300).

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

13645340 is a wasteful number, since it uses less digits than its factorization.

13645340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 13645340 is about 3693.9599348125. The cubic root of 13645340 is about 238.9616016461.

Adding to 13645340 its reverse (4354631), we get a palindrome (17999971).

The spelling of 13645340 in words is "thirteen million, six hundred forty-five thousand, three hundred forty".