78085744 has 60 divisors (see below), whose sum is σ = 174330360. Its totient is φ = 33598080.

The previous prime is 78085739. The next prime is 78085751. The reversal of 78085744 is 44758087.

It is a self number, because there is not a number n which added to its sum of digits gives 78085744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62922 + ... + 64150.

It is an arithmetic number, because the mean of its divisors is an integer number (2905506).

Almost surely, 2^78085744 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 78085744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87165180).

78085744 is an abundant number, since it is smaller than the sum of its proper divisors (96244616).

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

78085744 is a wasteful number, since it uses less digits than its factorization.

78085744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 78085744 is about 8836.6138311007. The cubic root of 78085744 is about 427.4223727362.

The spelling of 78085744 in words is "seventy-eight million, eighty-five thousand, seven hundred forty-four".