78869365 has 8 divisors (see below), whose sum is σ = 94763448. Its totient is φ = 63015360.

The previous prime is 78869359. The next prime is 78869381. The reversal of 78869365 is 56396887.

It can be written as a sum of positive squares in 4 ways, for example, as 18309841 + 60559524 = 4279^2 + 7782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78869365 - 2⁵ = 78869333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5502 + ... + 13711.

It is an arithmetic number, because the mean of its divisors is an integer number (11845431).

Almost surely, 2^78869365 is an apocalyptic number.

It is an amenable number.

78869365 is a deficient number, since it is larger than the sum of its proper divisors (15894083).

78869365 is a wasteful number, since it uses less digits than its factorization.

78869365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20039.

The product of its digits is 2177280, while the sum is 52.

The square root of 78869365 is about 8880.8425838993. The cubic root of 78869365 is about 428.8474000060.

The spelling of 78869365 in words is "seventy-eight million, eight hundred sixty-nine thousand, three hundred sixty-five".