640004514 has 16 divisors (see below), whose sum is σ = 1282462752. Its totient is φ = 212925888.

The previous prime is 640004513. The next prime is 640004537. The reversal of 640004514 is 415400046.

It is not an unprimeable number, because it can be changed into a prime (640004513) by changing a digit.

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, 98839 + ... + 105114.

It is an arithmetic number, because the mean of its divisors is an integer number (80153922).

Almost surely, 2^640004514 is an apocalyptic number.

640004514 is an abundant number, since it is smaller than the sum of its proper divisors (642458238).

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

640004514 is a wasteful number, since it uses less digits than its factorization.

640004514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204481.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 640004514 is about 25298.3104969482. The cubic root of 640004514 is about 861.7759020743.

The spelling of 640004514 in words is "six hundred forty million, four thousand, five hundred fourteen".