78061776 has 60 divisors (see below), whose sum is σ = 218387808. Its totient is φ = 24016512.

The previous prime is 78061769. The next prime is 78061787. The reversal of 78061776 is 67716087.

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, 3301 + ... + 12923.

Almost surely, 2^78061776 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 78061776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109193904).

78061776 is an abundant number, since it is smaller than the sum of its proper divisors (140326032).

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

78061776 is a wasteful number, since it uses less digits than its factorization.

78061776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9660 (or 9641 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 78061776 is about 8835.2575514243. The cubic root of 78061776 is about 427.3786365934.

The spelling of 78061776 in words is "seventy-eight million, sixty-one thousand, seven hundred seventy-six".