78623936 has 56 divisors (see below), whose sum is σ = 168152064. Its totient is φ = 36368640.

The previous prime is 78623933. The next prime is 78623939. The reversal of 78623936 is 63932687.

It is an interprime number because it is at equal distance from previous prime (78623933) and next prime (78623939).

It is not an unprimeable number, because it can be changed into a prime (78623933) 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 7 ways as a sum of consecutive naturals, for example, 44771 + ... + 46493.

Almost surely, 2^78623936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78623936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84076032).

78623936 is an abundant number, since it is smaller than the sum of its proper divisors (89528128).

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

78623936 is a wasteful number, since it uses less digits than its factorization.

78623936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1779 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 78623936 is about 8867.0139280369. The cubic root of 78623936 is about 428.4021026753.

The spelling of 78623936 in words is "seventy-eight million, six hundred twenty-three thousand, nine hundred thirty-six".