1978359248 has 10 divisors (see below), whose sum is σ = 3833071074. Its totient is φ = 989179616.

The previous prime is 1978359239. The next prime is 1978359281. The reversal of 1978359248 is 8429538791.

It can be written as a sum of positive squares in only one way, i.e., 1591371664 + 386987584 = 39892^2 + 19672^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1978359193 and 1978359202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61823711 + ... + 61823742.

Almost surely, 2^1978359248 is an apocalyptic number.

It is an amenable number.

1978359248 is a deficient number, since it is larger than the sum of its proper divisors (1854711826).

1978359248 is a wasteful number, since it uses less digits than its factorization.

1978359248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123647461 (or 123647455 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The square root of 1978359248 is about 44478.7505220189. The cubic root of 1978359248 is about 1255.3602872399.

The spelling of 1978359248 in words is "one billion, nine hundred seventy-eight million, three hundred fifty-nine thousand, two hundred forty-eight".