640230950 has 24 divisors (see below), whose sum is σ = 1192449720. Its totient is φ = 255744000.

The previous prime is 640230919. The next prime is 640230977. The reversal of 640230950 is 59032046.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30125 + ... + 46775.

It is an arithmetic number, because the mean of its divisors is an integer number (49685405).

Almost surely, 2^640230950 is an apocalyptic number.

640230950 is a deficient number, since it is larger than the sum of its proper divisors (552218770).

640230950 is a wasteful number, since it uses less digits than its factorization.

640230950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432 (or 17427 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 640230950 is about 25302.7854197912. The cubic root of 640230950 is about 861.8775232738.

Adding to 640230950 its reverse (59032046), we get a palindrome (699262996).

The spelling of 640230950 in words is "six hundred forty million, two hundred thirty thousand, nine hundred fifty".