78648988 has 24 divisors (see below), whose sum is σ = 153813744. Its totient is φ = 34876800.

The previous prime is 78648949. The next prime is 78648989. The reversal of 78648988 is 88984687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78648989) 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 7 ways as a sum of consecutive naturals, for example, 19995 + ... + 23602.

It is an arithmetic number, because the mean of its divisors is an integer number (6408906).

Almost surely, 2^78648988 is an apocalyptic number.

It is an amenable number.

78648988 is a deficient number, since it is larger than the sum of its proper divisors (75164756).

78648988 is a wasteful number, since it uses less digits than its factorization.

78648988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43653 (or 43651 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 58.

The square root of 78648988 is about 8868.4264669670. The cubic root of 78648988 is about 428.4475985313.

The spelling of 78648988 in words is "seventy-eight million, six hundred forty-eight thousand, nine hundred eighty-eight".