78448312 has 8 divisors (see below), whose sum is σ = 147090600. Its totient is φ = 39224152.

The previous prime is 78448309. The next prime is 78448313. The reversal of 78448312 is 21384487.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78448313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4903012 + ... + 4903027.

It is an arithmetic number, because the mean of its divisors is an integer number (18386325).

Almost surely, 2^78448312 is an apocalyptic number.

It is an amenable number.

78448312 is a deficient number, since it is larger than the sum of its proper divisors (68642288).

78448312 is a wasteful number, since it uses less digits than its factorization.

78448312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9806045 (or 9806041 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 78448312 is about 8857.1051704267. The cubic root of 78448312 is about 428.0828878393.

The spelling of 78448312 in words is "seventy-eight million, four hundred forty-eight thousand, three hundred twelve".