1000640332 has 24 divisors (see below), whose sum is σ = 1855484064. Its totient is φ = 470545152.

The previous prime is 1000640309. The next prime is 1000640393. The reversal of 1000640332 is 2330460001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104698 + ... + 113854.

It is an arithmetic number, because the mean of its divisors is an integer number (77311836).

Almost surely, 2^1000640332 is an apocalyptic number.

It is an amenable number.

1000640332 is a deficient number, since it is larger than the sum of its proper divisors (854843732).

1000640332 is a wasteful number, since it uses less digits than its factorization.

1000640332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10785 (or 10783 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1000640332 is about 31632.8995193296. The cubic root of 1000640332 is about 1000.2133984579.

The spelling of 1000640332 in words is "one billion, six hundred forty thousand, three hundred thirty-two".