78804450 has 72 divisors (see below), whose sum is σ = 217489428. Its totient is φ = 20442240.

The previous prime is 78804443. The next prime is 78804527. The reversal of 78804450 is 5440887.

It can be written as a sum of positive squares in 6 ways, for example, as 32387481 + 46416969 = 5691^2 + 6813^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14284 + ... + 19016.

Almost surely, 2^78804450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78804450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108744714).

78804450 is an abundant number, since it is smaller than the sum of its proper divisors (138684978).

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

78804450 is a wasteful number, since it uses less digits than its factorization.

78804450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788 (or 4780 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 78804450 is about 8877.1870544672. The cubic root of 78804450 is about 428.7297105830.

The spelling of 78804450 in words is "seventy-eight million, eight hundred four thousand, four hundred fifty".