78093834 has 64 divisors (see below), whose sum is σ = 193294080. Its totient is φ = 20482560.

The previous prime is 78093833. The next prime is 78093853. The reversal of 78093834 is 43839087.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (78093833) 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 31 ways as a sum of consecutive naturals, for example, 153172 + ... + 153680.

It is an arithmetic number, because the mean of its divisors is an integer number (3020220).

Almost surely, 2^78093834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78093834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96647040).

78093834 is an abundant number, since it is smaller than the sum of its proper divisors (115200246).

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

78093834 is a wasteful number, since it uses less digits than its factorization.

78093834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 78093834 is about 8837.0715737737. The cubic root of 78093834 is about 427.4371331240.

The spelling of 78093834 in words is "seventy-eight million, ninety-three thousand, eight hundred thirty-four".