78868469 has 8 divisors (see below), whose sum is σ = 79865688. Its totient is φ = 77875200.

The previous prime is 78868453. The next prime is 78868477. The reversal of 78868469 is 96486887.

It can be written as a sum of positive squares in 4 ways, for example, as 9229444 + 69639025 = 3038^2 + 8345^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78868469 - 2⁴ = 78868453 is a prime.

It is a super-2 number, since 2×78868469² = 12440470804807922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78868409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65069 + ... + 66269.

It is an arithmetic number, because the mean of its divisors is an integer number (9983211).

Almost surely, 2^78868469 is an apocalyptic number.

It is an amenable number.

78868469 is a deficient number, since it is larger than the sum of its proper divisors (997219).

78868469 is a wasteful number, since it uses less digits than its factorization.

78868469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975.

The product of its digits is 4644864, while the sum is 56.

The square root of 78868469 is about 8880.7921380922. The cubic root of 78868469 is about 428.8457760179.

The spelling of 78868469 in words is "seventy-eight million, eight hundred sixty-eight thousand, four hundred sixty-nine".