78775008 has 192 divisors, whose sum is σ = 243855360. Its totient is φ = 22044672.

The previous prime is 78774967. The next prime is 78775009. The reversal of 78775008 is 80057787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78775009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 997113 + ... + 997191.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^78775008 is an apocalyptic number.

78775008 is a gapful number since it is divisible by the number (78) 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 78775008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121927680).

78775008 is an abundant number, since it is smaller than the sum of its proper divisors (165080352).

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

78775008 is a wasteful number, since it uses less digits than its factorization.

78775008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 42.

The square root of 78775008 is about 8875.5286039762. The cubic root of 78775008 is about 428.6763116000.

The spelling of 78775008 in words is "seventy-eight million, seven hundred seventy-five thousand, eight".