640458182 has 32 divisors (see below), whose sum is σ = 1183678272. Its totient is φ = 253090944.

The previous prime is 640458179. The next prime is 640458199. The reversal of 640458182 is 281854046.

It is a happy number.

640458182 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270548 + ... + 272904.

It is an arithmetic number, because the mean of its divisors is an integer number (36989946).

Almost surely, 2^640458182 is an apocalyptic number.

640458182 is a deficient number, since it is larger than the sum of its proper divisors (543220090).

640458182 is a wasteful number, since it uses less digits than its factorization.

640458182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 640458182 is about 25307.2752780697. The cubic root of 640458182 is about 861.9794776222.

It can be divided in two parts, 64045 and 8182, that added together give a palindrome (72227).

The spelling of 640458182 in words is "six hundred forty million, four hundred fifty-eight thousand, one hundred eighty-two".