12640002 has 16 divisors (see below), whose sum is σ = 26095872. Its totient is φ = 4077360.

The previous prime is 12639989. The next prime is 12640003. The reversal of 12640002 is 20004621.

It is not an unprimeable number, because it can be changed into a prime (12640003) 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, 33793 + ... + 34164.

It is an arithmetic number, because the mean of its divisors is an integer number (1630992).

Almost surely, 2^12640002 is an apocalyptic number.

12640002 is an abundant number, since it is smaller than the sum of its proper divisors (13455870).

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

12640002 is a wasteful number, since it uses less digits than its factorization.

12640002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67993.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12640002 is about 3555.2780481982. The cubic root of 12640002 is about 232.9426691884.

Adding to 12640002 its reverse (20004621), we get a palindrome (32644623).

The spelling of 12640002 in words is "twelve million, six hundred forty thousand, two".