78683904 has 216 divisors, whose sum is σ = 254453472. Its totient is φ = 23224320.

The previous prime is 78683827. The next prime is 78683909. The reversal of 78683904 is 40938687.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78683904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78683909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1108189 + ... + 1108259.

Almost surely, 2^78683904 is an apocalyptic number.

78683904 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78683904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127226736).

78683904 is an abundant number, since it is smaller than the sum of its proper divisors (175769568).

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

78683904 is a wasteful number, since it uses less digits than its factorization.

78683904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 78683904 is about 8870.3948051933. The cubic root of 78683904 is about 428.5109918586.

The spelling of 78683904 in words is "seventy-eight million, six hundred eighty-three thousand, nine hundred four".