78248169 has 6 divisors (see below), whose sum is σ = 113025146. Its totient is φ = 52165440.

The previous prime is 78248147. The next prime is 78248171. The reversal of 78248169 is 96184287.

It can be written as a sum of positive squares in only one way, i.e., 40793769 + 37454400 = 6387^2 + 6120^2 .

It is not a de Polignac number, because 78248169 - 2⁷ = 78248041 is a prime.

It is a super-2 number, since 2×78248169² = 12245551903705122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78243169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4347112 + ... + 4347129.

Almost surely, 2^78248169 is an apocalyptic number.

It is an amenable number.

78248169 is a deficient number, since it is larger than the sum of its proper divisors (34776977).

78248169 is a wasteful number, since it uses less digits than its factorization.

78248169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694247 (or 8694244 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 78248169 is about 8845.7995116326. The cubic root of 78248169 is about 427.7185258063.

The spelling of 78248169 in words is "seventy-eight million, two hundred forty-eight thousand, one hundred sixty-nine".