78193448 has 16 divisors (see below), whose sum is σ = 147425460. Its totient is φ = 38880000.

The previous prime is 78193447. The next prime is 78193457. The reversal of 78193448 is 84439187.

It can be written as a sum of positive squares in 2 ways, for example, as 60871204 + 17322244 = 7802^2 + 4162^2 .

It is a super-2 number, since 2×78193448² = 12228430620257408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78193399 and 78193408.

It is not an unprimeable number, because it can be changed into a prime (78193447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25553 + ... + 28448.

Almost surely, 2^78193448 is an apocalyptic number.

It is an amenable number.

78193448 is a deficient number, since it is larger than the sum of its proper divisors (69232012).

78193448 is a wasteful number, since it uses less digits than its factorization.

78193448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54188 (or 54184 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 78193448 is about 8842.7059207010. The cubic root of 78193448 is about 427.6187976217.

The spelling of 78193448 in words is "seventy-eight million, one hundred ninety-three thousand, four hundred forty-eight".