78194448 has 30 divisors (see below), whose sum is σ = 218836254. Its totient is φ = 26064768.

The previous prime is 78194401. The next prime is 78194449. The reversal of 78194448 is 84449187.

It can be written as a sum of positive squares in only one way, i.e., 68757264 + 9437184 = 8292^2 + 3072^2 .

It is a super-2 number, since 2×78194448² = 12228743396049408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78194449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271365 + ... + 271652.

Almost surely, 2^78194448 is an apocalyptic number.

It is an amenable number.

78194448 is an abundant number, since it is smaller than the sum of its proper divisors (140641806).

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

78194448 is a wasteful number, since it uses less digits than its factorization.

78194448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543031 (or 543022 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 78194448 is about 8842.7624642981. The cubic root of 78194448 is about 427.6206205237.

The spelling of 78194448 in words is "seventy-eight million, one hundred ninety-four thousand, four hundred forty-eight".