78661848 has 32 divisors (see below), whose sum is σ = 197107200. Its totient is φ = 26160288.

The previous prime is 78661841. The next prime is 78661853. The reversal of 78661848 is 84816687.

It is a junction number, because it is equal to n+sod(n) for n = 78661797 and 78661806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78661841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7573 + ... + 14651.

It is an arithmetic number, because the mean of its divisors is an integer number (6159600).

Almost surely, 2^78661848 is an apocalyptic number.

It is an amenable number.

78661848 is an abundant number, since it is smaller than the sum of its proper divisors (118445352).

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

78661848 is a wasteful number, since it uses less digits than its factorization.

78661848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551 (or 7547 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 78661848 is about 8869.1514813989. The cubic root of 78661848 is about 428.4709492697.

The spelling of 78661848 in words is "seventy-eight million, six hundred sixty-one thousand, eight hundred forty-eight".