640424046 has 16 divisors (see below), whose sum is σ = 1315466064. Its totient is φ = 207705024.

The previous prime is 640423991. The next prime is 640424053.

640424046 is nontrivially palindromic in base 10.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1442175 + ... + 1442618.

It is an arithmetic number, because the mean of its divisors is an integer number (82216629).

Almost surely, 2^640424046 is an apocalyptic number.

640424046 is an abundant number, since it is smaller than the sum of its proper divisors (675042018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640424046 is a wasteful number, since it uses less digits than its factorization.

640424046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884835.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 640424046 is about 25306.6008385164. The cubic root of 640424046 is about 861.9641630369.

The spelling of 640424046 in words is "six hundred forty million, four hundred twenty-four thousand, forty-six".