1640803416 has 96 divisors (see below), whose sum is σ = 5052475440. Its totient is φ = 441219072.

The previous prime is 1640803391. The next prime is 1640803421. The reversal of 1640803416 is 6143080461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21045 + ... + 61028.

Almost surely, 2^1640803416 is an apocalyptic number.

It is an amenable number.

1640803416 is an abundant number, since it is smaller than the sum of its proper divisors (3411672024).

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

1640803416 is a wasteful number, since it uses less digits than its factorization.

1640803416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82113 (or 82102 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1640803416 is about 40506.8317200938. The cubic root of 1640803416 is about 1179.4662471594.

Adding to 1640803416 its reverse (6143080461), we get a palindrome (7783883877).

The spelling of 1640803416 in words is "one billion, six hundred forty million, eight hundred three thousand, four hundred sixteen".