13815490 has 16 divisors (see below), whose sum is σ = 26781048. Its totient is φ = 5101056.

The previous prime is 13815481. The next prime is 13815497. The reversal of 13815490 is 9451831.

13815490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3530641 + 10284849 = 1879^2 + 3207^2 .

It is not an unprimeable number, because it can be changed into a prime (13815497) 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, 53007 + ... + 53266.

Almost surely, 2^13815490 is an apocalyptic number.

13815490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13815490 is a deficient number, since it is larger than the sum of its proper divisors (12965558).

13815490 is a wasteful number, since it uses less digits than its factorization.

13815490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106293.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 13815490 is about 3716.9194233935. The cubic root of 13815490 is about 239.9507422058.

The spelling of 13815490 in words is "thirteen million, eight hundred fifteen thousand, four hundred ninety".