640885202 has 8 divisors (see below), whose sum is σ = 1003124736. Its totient is φ = 306510292.

The previous prime is 640885183. The next prime is 640885211. The reversal of 640885202 is 202588046.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6966098 + ... + 6966189.

It is an arithmetic number, because the mean of its divisors is an integer number (125390592).

Almost surely, 2^640885202 is an apocalyptic number.

640885202 is a deficient number, since it is larger than the sum of its proper divisors (362239534).

640885202 is a wasteful number, since it uses less digits than its factorization.

640885202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13932312.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 640885202 is about 25315.7105766360. The cubic root of 640885202 is about 862.1710075362.

The spelling of 640885202 in words is "six hundred forty million, eight hundred eighty-five thousand, two hundred two".