13074640 has 20 divisors (see below), whose sum is σ = 30398724. Its totient is φ = 5229824.

The previous prime is 13074631. The next prime is 13074643. The reversal of 13074640 is 4647031.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 3489424 = 3096^2 + 1868^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×13074640² = 341892422259200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13074643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81637 + ... + 81796.

Almost surely, 2^13074640 is an apocalyptic number.

13074640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13074640 is an abundant number, since it is smaller than the sum of its proper divisors (17324084).

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

13074640 is a wasteful number, since it uses less digits than its factorization.

13074640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163446 (or 163440 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 13074640 is about 3615.8871663812. The cubic root of 13074640 is about 235.5826195451.

The spelling of 13074640 in words is "thirteen million, seventy-four thousand, six hundred forty".