1947253648 has 20 divisors (see below), whose sum is σ = 3793886640. Its totient is φ = 968186144.

The previous prime is 1947253643. The next prime is 1947253673. The reversal of 1947253648 is 8463527491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1947253643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337090 + ... + 342817.

It is an arithmetic number, because the mean of its divisors is an integer number (189694332).

Almost surely, 2^1947253648 is an apocalyptic number.

It is an amenable number.

1947253648 is a deficient number, since it is larger than the sum of its proper divisors (1846632992).

1947253648 is a wasteful number, since it uses less digits than its factorization.

1947253648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680094 (or 680088 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 1947253648 is about 44127.6970620494. The cubic root of 1947253648 is about 1248.7461876909.

The spelling of 1947253648 in words is "one billion, nine hundred forty-seven million, two hundred fifty-three thousand, six hundred forty-eight".