78069744 has 100 divisors (see below), whose sum is σ = 230011320. Its totient is φ = 25557120.

The previous prime is 78069713. The next prime is 78069829. The reversal of 78069744 is 44796087.

It is a self number, because there is not a number n which added to its sum of digits gives 78069744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75954 + ... + 76974.

Almost surely, 2^78069744 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 78069744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115005660).

78069744 is an abundant number, since it is smaller than the sum of its proper divisors (151941576).

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

78069744 is a wasteful number, since it uses less digits than its factorization.

78069744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 78069744 is about 8835.7084605593. The cubic root of 78069744 is about 427.3931773724.

The spelling of 78069744 in words is "seventy-eight million, sixty-nine thousand, seven hundred forty-four".