1640332 has 12 divisors (see below), whose sum is σ = 2894080. Its totient is φ = 813456.

The previous prime is 1640323. The next prime is 1640333. The reversal of 1640332 is 2330461.

It is not an unprimeable number, because it can be changed into a prime (1640333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107 + ... + 2122.

2^1640332 is an apocalyptic number.

It is an amenable number.

1640332 is a deficient number, since it is larger than the sum of its proper divisors (1253748).

1640332 is a wasteful number, since it uses less digits than its factorization.

1640332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360 (or 3358 counting only the distinct ones).

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

The square root of 1640332 is about 1280.7544651494. The cubic root of 1640332 is about 117.9353279631.

Adding to 1640332 its reverse (2330461), we get a palindrome (3970793).

The spelling of 1640332 in words is "one million, six hundred forty thousand, three hundred thirty-two".