1649820744 has 256 divisors, whose sum is σ = 5560934400. Its totient is φ = 446342400.

The previous prime is 1649820737. The next prime is 1649820761. The reversal of 1649820744 is 4470289461.

It is a self number, because there is not a number n which added to its sum of digits gives 1649820744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 956667 + ... + 958389.

It is an arithmetic number, because the mean of its divisors is an integer number (21722400).

Almost surely, 2^1649820744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649820744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2780467200).

1649820744 is an abundant number, since it is smaller than the sum of its proper divisors (3911113656).

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

1649820744 is a wasteful number, since it uses less digits than its factorization.

1649820744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793 (or 1783 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 1649820744 is about 40617.9854744176. The cubic root of 1649820744 is about 1181.6229568621.

The spelling of 1649820744 in words is "one billion, six hundred forty-nine million, eight hundred twenty thousand, seven hundred forty-four".