13645990 has 16 divisors (see below), whose sum is σ = 25855920. Its totient is φ = 5171040.

The previous prime is 13645981. The next prime is 13645991. The reversal of 13645990 is 9954631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13645991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35721 + ... + 36100.

It is an arithmetic number, because the mean of its divisors is an integer number (1615995).

Almost surely, 2^13645990 is an apocalyptic number.

13645990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13645990 is a deficient number, since it is larger than the sum of its proper divisors (12209930).

13645990 is a wasteful number, since it uses less digits than its factorization.

13645990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71847.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 13645990 is about 3694.0479152280. The cubic root of 13645990 is about 238.9653959225.

The spelling of 13645990 in words is "thirteen million, six hundred forty-five thousand, nine hundred ninety".