78059988 has 36 divisors (see below), whose sum is σ = 208926900. Its totient is φ = 24489216.

The previous prime is 78059987. The next prime is 78060013. The reversal of 78059988 is 88995087.

It can be written as a sum of positive squares in 2 ways, for example, as 72386064 + 5673924 = 8508^2 + 2382^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78059983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63163 + ... + 64386.

It is an arithmetic number, because the mean of its divisors is an integer number (5803525).

Almost surely, 2^78059988 is an apocalyptic number.

It is an amenable number.

78059988 is an abundant number, since it is smaller than the sum of its proper divisors (130866912).

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

78059988 is a wasteful number, since it uses less digits than its factorization.

78059988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127576 (or 127571 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The square root of 78059988 is about 8835.1563653396. The cubic root of 78059988 is about 427.3753735416.

The spelling of 78059988 in words is "seventy-eight million, fifty-nine thousand, nine hundred eighty-eight".