1878772648 has 16 divisors (see below), whose sum is σ = 3526960500. Its totient is φ = 938249856.

The previous prime is 1878772619. The next prime is 1878772657. The reversal of 1878772648 is 8462778781.

It can be written as a sum of positive squares in 2 ways, for example, as 1836808164 + 41964484 = 42858^2 + 6478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1878772592 and 1878772601.

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, 135013 + ... + 148276.

Almost surely, 2^1878772648 is an apocalyptic number.

It is an amenable number.

1878772648 is a deficient number, since it is larger than the sum of its proper divisors (1648187852).

1878772648 is a wasteful number, since it uses less digits than its factorization.

1878772648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284124 (or 284120 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 58.

The square root of 1878772648 is about 43344.8110850653. The cubic root of 1878772648 is about 1233.9325186575.

The spelling of 1878772648 in words is "one billion, eight hundred seventy-eight million, seven hundred seventy-two thousand, six hundred forty-eight".