78882865 has 8 divisors (see below), whose sum is σ = 94735080. Its totient is φ = 63055872.

The previous prime is 78882863. The next prime is 78882899. The reversal of 78882865 is 56828887.

It can be written as a sum of positive squares in 4 ways, for example, as 1934881 + 76947984 = 1391^2 + 8772^2 .

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 78882865 - 2¹ = 78882863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78882863) 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, 1447 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (11841885).

Almost surely, 2^78882865 is an apocalyptic number.

It is an amenable number.

78882865 is a deficient number, since it is larger than the sum of its proper divisors (15852215).

78882865 is a wasteful number, since it uses less digits than its factorization.

78882865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12611.

The product of its digits is 1720320, while the sum is 52.

The square root of 78882865 is about 8881.6026143934. The cubic root of 78882865 is about 428.8718670877.

The spelling of 78882865 in words is "seventy-eight million, eight hundred eighty-two thousand, eight hundred sixty-five".