12640898 has 8 divisors (see below), whose sum is σ = 19075392. Its totient is φ = 6282436.

The previous prime is 12640891. The next prime is 12640907. The reversal of 12640898 is 89804621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12640891) 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, 18590 + ... + 19257.

It is an arithmetic number, because the mean of its divisors is an integer number (2384424).

Almost surely, 2^12640898 is an apocalyptic number.

12640898 is a deficient number, since it is larger than the sum of its proper divisors (6434494).

12640898 is a wasteful number, since it uses less digits than its factorization.

12640898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38016.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 12640898 is about 3555.4040558001. The cubic root of 12640898 is about 232.9481731880.

The spelling of 12640898 in words is "twelve million, six hundred forty thousand, eight hundred ninety-eight".