1649841884 has 12 divisors (see below), whose sum is σ = 2893409064. Its totient is φ = 823153584.

The previous prime is 1649841883. The next prime is 1649841899. The reversal of 1649841884 is 4881489461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649841883) 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, 439739 + ... + 443474.

It is an arithmetic number, because the mean of its divisors is an integer number (241117422).

Almost surely, 2^1649841884 is an apocalyptic number.

It is an amenable number.

1649841884 is a deficient number, since it is larger than the sum of its proper divisors (1243567180).

1649841884 is a wasteful number, since it uses less digits than its factorization.

1649841884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883684 (or 883682 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 53.

The square root of 1649841884 is about 40618.2457031320. The cubic root of 1649841884 is about 1181.6280037543.

The spelling of 1649841884 in words is "one billion, six hundred forty-nine million, eight hundred forty-one thousand, eight hundred eighty-four".