1949856680 has 32 divisors (see below), whose sum is σ = 4494185640. Its totient is φ = 760919040.

The previous prime is 1949856661. The next prime is 1949856683. The reversal of 1949856680 is 866589491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 937216996 + 1012639684 = 30614^2 + 31822^2 .

It is not an unprimeable number, because it can be changed into a prime (1949856683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592829 + ... + 596108.

Almost surely, 2^1949856680 is an apocalyptic number.

1949856680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1949856680 is an abundant number, since it is smaller than the sum of its proper divisors (2544328960).

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

1949856680 is a wasteful number, since it uses less digits than its factorization.

1949856680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188989 (or 1188985 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 1949856680 is about 44157.1815223753. The cubic root of 1949856680 is about 1249.3023691214.

The spelling of 1949856680 in words is "one billion, nine hundred forty-nine million, eight hundred fifty-six thousand, six hundred eighty".