1336640 has 28 divisors (see below), whose sum is σ = 3183636. Its totient is φ = 534528.

The previous prime is 1336637. The next prime is 1336649. The reversal of 1336640 is 466331.

It can be written as a sum of positive squares in 2 ways, for example, as 906304 + 430336 = 952^2 + 656^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1336649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1769 + ... + 2408.

2^1336640 is an apocalyptic number.

1336640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1336640 is an abundant number, since it is smaller than the sum of its proper divisors (1846996).

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

1336640 is an equidigital number, since it uses as much as digits as its factorization.

1336640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1336640 is about 1156.1314804122. The cubic root of 1336640 is about 110.1551529576.

The spelling of 1336640 in words is "one million, three hundred thirty-six thousand, six hundred forty".