1949447680 has 80 divisors (see below), whose sum is σ = 4710595824. Its totient is φ = 773693440.

The previous prime is 1949447677. The next prime is 1949447693. The reversal of 1949447680 is 867449491.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 332454 + ... + 338266.

Almost surely, 2^1949447680 is an apocalyptic number.

1949447680 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 1949447680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2355297912).

1949447680 is an abundant number, since it is smaller than the sum of its proper divisors (2761148144).

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

1949447680 is an equidigital number, since it uses as much as digits as its factorization.

1949447680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967 (or 5951 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 1949447680 is about 44152.5500962289. The cubic root of 1949447680 is about 1249.2150122052.

The spelling of 1949447680 in words is "one billion, nine hundred forty-nine million, four hundred forty-seven thousand, six hundred eighty".