78995449 has 16 divisors (see below), whose sum is σ = 88416720. Its totient is φ = 70076160.

The previous prime is 78995443. The next prime is 78995453. The reversal of 78995449 is 94459987.

It can be written as a sum of positive squares in 8 ways, for example, as 6864400 + 72131049 = 2620^2 + 8493^2 .

It is a cyclic number.

It is not a de Polignac number, because 78995449 - 2⁷ = 78995321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78995449.

It is not an unprimeable number, because it can be changed into a prime (78995443) 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, 119179 + ... + 119839.

It is an arithmetic number, because the mean of its divisors is an integer number (5526045).

Almost surely, 2^78995449 is an apocalyptic number.

It is an amenable number.

78995449 is a deficient number, since it is larger than the sum of its proper divisors (9421271).

78995449 is a wasteful number, since it uses less digits than its factorization.

78995449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020.

The product of its digits is 3265920, while the sum is 55.

The square root of 78995449 is about 8887.9383998765. The cubic root of 78995449 is about 429.0758030445.

The spelling of 78995449 in words is "seventy-eight million, nine hundred ninety-five thousand, four hundred forty-nine".