640224958 has 8 divisors (see below), whose sum is σ = 991316160. Its totient is φ = 309786240.

The previous prime is 640224953. The next prime is 640224973. The reversal of 640224958 is 859422046.

640224958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×640224958² = 819775993692203528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 640224958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640224953) 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, 5163043 + ... + 5163166.

It is an arithmetic number, because the mean of its divisors is an integer number (123914520).

Almost surely, 2^640224958 is an apocalyptic number.

640224958 is a deficient number, since it is larger than the sum of its proper divisors (351091202).

640224958 is a wasteful number, since it uses less digits than its factorization.

640224958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326242.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 640224958 is about 25302.6670135778. The cubic root of 640224958 is about 861.8748344596.

The spelling of 640224958 in words is "six hundred forty million, two hundred twenty-four thousand, nine hundred fifty-eight".