640910034 has 24 divisors (see below), whose sum is σ = 1436523660. Its totient is φ = 206269728.

The previous prime is 640910029. The next prime is 640910057. The reversal of 640910034 is 430019046.

640910034 is a `hidden beast` number, since 640 + 9 + 10 + 0 + 3 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 640343025 + 567009 = 25305^2 + 753^2 .

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 11 ways as a sum of consecutive naturals, for example, 613377 + ... + 614420.

Almost surely, 2^640910034 is an apocalyptic number.

640910034 is an abundant number, since it is smaller than the sum of its proper divisors (795613626).

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

640910034 is a wasteful number, since it uses less digits than its factorization.

640910034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227834 (or 1227831 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 640910034 is about 25316.2010183203. The cubic root of 640910034 is about 862.1821427358.

The spelling of 640910034 in words is "six hundred forty million, nine hundred ten thousand, thirty-four".