78168248 has 8 divisors (see below), whose sum is σ = 146565480. Its totient is φ = 39084120.

The previous prime is 78168241. The next prime is 78168257. The reversal of 78168248 is 84286187.

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

It is a super-2 number, since 2×78168248² = 12220549990779008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78168199 and 78168208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78168241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4885508 + ... + 4885523.

It is an arithmetic number, because the mean of its divisors is an integer number (18320685).

Almost surely, 2^78168248 is an apocalyptic number.

It is an amenable number.

78168248 is a deficient number, since it is larger than the sum of its proper divisors (68397232).

78168248 is a wasteful number, since it uses less digits than its factorization.

78168248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9771037 (or 9771033 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The square root of 78168248 is about 8841.2809026747. The cubic root of 78168248 is about 427.5728553601.

The spelling of 78168248 in words is "seventy-eight million, one hundred sixty-eight thousand, two hundred forty-eight".