12640496 has 20 divisors (see below), whose sum is σ = 26717784. Its totient is φ = 5745600.

The previous prime is 12640489. The next prime is 12640499. The reversal of 12640496 is 69404621.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640499) 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, 35735 + ... + 36086.

Almost surely, 2^12640496 is an apocalyptic number.

12640496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12640496 is an abundant number, since it is smaller than the sum of its proper divisors (14077288).

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

12640496 is a wasteful number, since it uses less digits than its factorization.

12640496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71840 (or 71834 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 12640496 is about 3555.3475216918. The cubic root of 12640496 is about 232.9457037918.

The spelling of 12640496 in words is "twelve million, six hundred forty thousand, four hundred ninety-six".