640260132 has 48 divisors (see below), whose sum is σ = 1536890880. Its totient is φ = 207351072.

The previous prime is 640260113. The next prime is 640260133. The reversal of 640260132 is 231062046.

It is not an unprimeable number, because it can be changed into a prime (640260133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74313 + ... + 82479.

It is an arithmetic number, because the mean of its divisors is an integer number (32018560).

Almost surely, 2^640260132 is an apocalyptic number.

It is an amenable number.

640260132 is an abundant number, since it is smaller than the sum of its proper divisors (896630748).

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

640260132 is a wasteful number, since it uses less digits than its factorization.

640260132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8360 (or 8358 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 640260132 is about 25303.3620691006. The cubic root of 640260132 is about 861.8906179900.

The spelling of 640260132 in words is "six hundred forty million, two hundred sixty thousand, one hundred thirty-two".