1948648978 has 8 divisors (see below), whose sum is σ = 2923712460. Its totient is φ = 974078160.

The previous prime is 1948648963. The next prime is 1948648979. The reversal of 1948648978 is 8798468491.

It can be written as a sum of positive squares in 2 ways, for example, as 1947192129 + 1456849 = 44127^2 + 1207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1948648979) 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 3 ways as a sum of consecutive naturals, for example, 113113 + ... + 129196.

Almost surely, 2^1948648978 is an apocalyptic number.

1948648978 is a deficient number, since it is larger than the sum of its proper divisors (975063482).

1948648978 is a wasteful number, since it uses less digits than its factorization.

1948648978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246332.

The product of its digits is 27869184, while the sum is 64.

The square root of 1948648978 is about 44143.5043692727. The cubic root of 1948648978 is about 1249.0443849327.

The spelling of 1948648978 in words is "one billion, nine hundred forty-eight million, six hundred forty-eight thousand, nine hundred seventy-eight".