78936816 has 40 divisors (see below), whose sum is σ = 233052544. Its totient is φ = 22553280.

The previous prime is 78936743. The next prime is 78936817. The reversal of 78936816 is 61863987.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78936817) 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, 117130 + ... + 117801.

Almost surely, 2^78936816 is an apocalyptic number.

It is an amenable number.

78936816 is an abundant number, since it is smaller than the sum of its proper divisors (154115728).

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

78936816 is a wasteful number, since it uses less digits than its factorization.

78936816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234949 (or 234943 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 78936816 is about 8884.6393286391. The cubic root of 78936816 is about 428.9696187482.

The spelling of 78936816 in words is "seventy-eight million, nine hundred thirty-six thousand, eight hundred sixteen".