78885648 has 30 divisors (see below), whose sum is σ = 220770654. Its totient is φ = 26295168.

The previous prime is 78885647. The next prime is 78885649. The reversal of 78885648 is 84658887.

78885648 is a `hidden beast` number, since 78 + 8 + 8 + 564 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (78885647) and next prime (78885649).

It can be written as a sum of positive squares in only one way, i.e., 76947984 + 1937664 = 8772^2 + 1392^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78885594 and 78885603.

It is not an unprimeable number, because it can be changed into a prime (78885647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273765 + ... + 274052.

Almost surely, 2^78885648 is an apocalyptic number.

It is an amenable number.

78885648 is an abundant number, since it is smaller than the sum of its proper divisors (141885006).

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

78885648 is a wasteful number, since it uses less digits than its factorization.

78885648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547831 (or 547822 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The square root of 78885648 is about 8881.7592851867. The cubic root of 78885648 is about 428.8769105843.

It can be divided in two parts, 788 and 85648, that added together give a square (86436 = 294²).

The spelling of 78885648 in words is "seventy-eight million, eight hundred eighty-five thousand, six hundred forty-eight".