1640336244 has 24 divisors (see below), whose sum is σ = 3930896928. Its totient is φ = 532000800.

The previous prime is 1640336233. The next prime is 1640336249. The reversal of 1640336244 is 4426330461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640336249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846782 + ... + 1847669.

It is an arithmetic number, because the mean of its divisors is an integer number (163787372).

Almost surely, 2^1640336244 is an apocalyptic number.

It is an amenable number.

1640336244 is an abundant number, since it is smaller than the sum of its proper divisors (2290560684).

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

1640336244 is a wasteful number, since it uses less digits than its factorization.

1640336244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694495 (or 3694493 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 1640336244 is about 40501.0647267451. The cubic root of 1640336244 is about 1179.3542967364.

The spelling of 1640336244 in words is "one billion, six hundred forty million, three hundred thirty-six thousand, two hundred forty-four".