78550912 has 64 divisors (see below), whose sum is σ = 174493440. Its totient is φ = 34915840.

The previous prime is 78550907. The next prime is 78550919. The reversal of 78550912 is 21905587.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78550919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65583 + ... + 66769.

It is an arithmetic number, because the mean of its divisors is an integer number (2726460).

Almost surely, 2^78550912 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 78550912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87246720).

78550912 is an abundant number, since it is smaller than the sum of its proper divisors (95942528).

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

78550912 is a wasteful number, since it uses less digits than its factorization.

78550912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 78550912 is about 8862.8952380134. The cubic root of 78550912 is about 428.2694317743.

The spelling of 78550912 in words is "seventy-eight million, five hundred fifty thousand, nine hundred twelve".