78916650 has 48 divisors (see below), whose sum is σ = 198421824. Its totient is φ = 20753280.

The previous prime is 78916639. The next prime is 78916661. The reversal of 78916650 is 5661987.

It is an interprime number because it is at equal distance from previous prime (78916639) and next prime (78916661).

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7347 + ... + 14553.

It is an arithmetic number, because the mean of its divisors is an integer number (4133788).

Almost surely, 2^78916650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78916650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99210912).

78916650 is an abundant number, since it is smaller than the sum of its proper divisors (119505174).

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

78916650 is a wasteful number, since it uses less digits than its factorization.

78916650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7295 (or 7290 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 78916650 is about 8883.5043760894. The cubic root of 78916650 is about 428.9330859931.

It can be divided in two parts, 7891 and 6650, that added together give a palindrome (14541).

The spelling of 78916650 in words is "seventy-eight million, nine hundred sixteen thousand, six hundred fifty".