78115448 has 16 divisors (see below), whose sum is σ = 147015000. Its totient is φ = 38911456.

The previous prime is 78115447. The next prime is 78115451. The reversal of 78115448 is 84451187.

It is a happy number.

It is a super-2 number, since 2×78115448² = 12204046432481408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78115447) 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, 15998 + ... + 20301.

Almost surely, 2^78115448 is an apocalyptic number.

It is an amenable number.

78115448 is a deficient number, since it is larger than the sum of its proper divisors (68899552).

78115448 is a wasteful number, since it uses less digits than its factorization.

78115448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36574 (or 36570 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 78115448 is about 8838.2944055966. The cubic root of 78115448 is about 427.4765633561.

The spelling of 78115448 in words is "seventy-eight million, one hundred fifteen thousand, four hundred forty-eight".