1640816732 has 24 divisors (see below), whose sum is σ = 2965721472. Its totient is φ = 793497600.

The previous prime is 1640816731. The next prime is 1640816741. The reversal of 1640816732 is 2376180461.

It is a super-2 number, since 2×1640816732² = 5384559096022319648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640816731) 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, 363932 + ... + 368412.

It is an arithmetic number, because the mean of its divisors is an integer number (123571728).

Almost surely, 2^1640816732 is an apocalyptic number.

It is an amenable number.

1640816732 is a deficient number, since it is larger than the sum of its proper divisors (1324904740).

1640816732 is a wasteful number, since it uses less digits than its factorization.

1640816732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7469 (or 7467 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1640816732 is about 40506.9960870959. The cubic root of 1640816732 is about 1179.4694378178.

The spelling of 1640816732 in words is "one billion, six hundred forty million, eight hundred sixteen thousand, seven hundred thirty-two".