1649421960 has 96 divisors (see below), whose sum is σ = 5113393920. Its totient is φ = 425627520.

The previous prime is 1649421937. The next prime is 1649421967. The reversal of 1649421960 is 691249461.

It is not an unprimeable number, because it can be changed into a prime (1649421967) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 108169 + ... + 122471.

It is an arithmetic number, because the mean of its divisors is an integer number (53264520).

Almost surely, 2^1649421960 is an apocalyptic number.

1649421960 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 1649421960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2556696960).

1649421960 is an abundant number, since it is smaller than the sum of its proper divisors (3463971960).

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

1649421960 is a wasteful number, since it uses less digits than its factorization.

1649421960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14379 (or 14344 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1649421960 is about 40613.0762193656. The cubic root of 1649421960 is about 1181.5277444373.

The spelling of 1649421960 in words is "one billion, six hundred forty-nine million, four hundred twenty-one thousand, nine hundred sixty".