78447248 has 80 divisors (see below), whose sum is σ = 177738624. Its totient is φ = 33146880.

The previous prime is 78447241. The next prime is 78447253. The reversal of 78447248 is 84274487.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 78447199 and 78447208.

It is not an unprimeable number, because it can be changed into a prime (78447241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469661 + ... + 469827.

Almost surely, 2^78447248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78447248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88869312).

78447248 is an abundant number, since it is smaller than the sum of its proper divisors (99291376).

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

78447248 is a wasteful number, since it uses less digits than its factorization.

78447248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 354 counting only the distinct ones).

The product of its digits is 401408, while the sum is 44.

The square root of 78447248 is about 8857.0451054514. The cubic root of 78447248 is about 428.0809524577.

The spelling of 78447248 in words is "seventy-eight million, four hundred forty-seven thousand, two hundred forty-eight".