640284058 has 8 divisors (see below), whose sum is σ = 960647040. Its totient is φ = 320068380.

The previous prime is 640284037. The next prime is 640284077. The reversal of 640284058 is 850482046.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25228 + ... + 43783.

It is an arithmetic number, because the mean of its divisors is an integer number (120080880).

Almost surely, 2^640284058 is an apocalyptic number.

640284058 is a deficient number, since it is larger than the sum of its proper divisors (320362982).

640284058 is a wasteful number, since it uses less digits than its factorization.

640284058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73652.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 640284058 is about 25303.8348477064. The cubic root of 640284058 is about 861.9013539066.

It can be divided in two parts, 64028 and 4058, that added together give a palindrome (68086).

The spelling of 640284058 in words is "six hundred forty million, two hundred eighty-four thousand, fifty-eight".