13664450 has 12 divisors (see below), whose sum is σ = 25415970. Its totient is φ = 5465760.

The previous prime is 13664429. The next prime is 13664467. The reversal of 13664450 is 5446631.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10118761 + 3545689 = 3181^2 + 1883^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136595 + ... + 136694.

Almost surely, 2^13664450 is an apocalyptic number.

13664450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13664450 is a deficient number, since it is larger than the sum of its proper divisors (11751520).

13664450 is a wasteful number, since it uses less digits than its factorization.

13664450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273301 (or 273296 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 13664450 is about 3696.5456848252. The cubic root of 13664450 is about 239.0731031081.

The spelling of 13664450 in words is "thirteen million, six hundred sixty-four thousand, four hundred fifty".