1649834760 has 128 divisors (see below), whose sum is σ = 5673369600. Its totient is φ = 375985920.

The previous prime is 1649834713. The next prime is 1649834777. The reversal of 1649834760 is 674389461.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298825 + ... + 304295.

It is an arithmetic number, because the mean of its divisors is an integer number (44323200).

Almost surely, 2^1649834760 is an apocalyptic number.

1649834760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649834760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2836684800).

1649834760 is an abundant number, since it is smaller than the sum of its proper divisors (4023534840).

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

1649834760 is a wasteful number, since it uses less digits than its factorization.

1649834760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851 (or 5847 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 1649834760 is about 40618.1580084573. The cubic root of 1649834760 is about 1181.6263029994.

The spelling of 1649834760 in words is "one billion, six hundred forty-nine million, eight hundred thirty-four thousand, seven hundred sixty".