1945723648 has 36 divisors (see below), whose sum is σ = 4236929928. Its totient is φ = 884418560.

The previous prime is 1945723603. The next prime is 1945723673. The reversal of 1945723648 is 8463275491.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342661 + ... + 348292.

It is an arithmetic number, because the mean of its divisors is an integer number (117692498).

Almost surely, 2^1945723648 is an apocalyptic number.

It is an amenable number.

1945723648 is an abundant number, since it is smaller than the sum of its proper divisors (2291206280).

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

1945723648 is an equidigital number, since it uses as much as digits as its factorization.

1945723648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690980 (or 690966 counting only the distinct ones).

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

The square root of 1945723648 is about 44110.3576045355. The cubic root of 1945723648 is about 1248.4190462178.

The spelling of 1945723648 in words is "one billion, nine hundred forty-five million, seven hundred twenty-three thousand, six hundred forty-eight".