78952869 has 12 divisors (see below), whose sum is σ = 114467392. Its totient is φ = 52439400.

The previous prime is 78952843. The next prime is 78952871. The reversal of 78952869 is 96825987.

It is a happy number.

It is not a de Polignac number, because 78952869 - 2²¹ = 76855717 is a prime.

It is a super-2 number, since 2×78952869² = 12467111046662322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78952469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13747 + ... + 18624.

Almost surely, 2^78952869 is an apocalyptic number.

It is an amenable number.

78952869 is a deficient number, since it is larger than the sum of its proper divisors (35514523).

78952869 is a wasteful number, since it uses less digits than its factorization.

78952869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32648 (or 32645 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 78952869 is about 8885.5426958628. The cubic root of 78952869 is about 428.9986959388.

The spelling of 78952869 in words is "seventy-eight million, nine hundred fifty-two thousand, eight hundred sixty-nine".