78628165 has 32 divisors (see below), whose sum is σ = 118609920. Its totient is φ = 48609600.

The previous prime is 78628159. The next prime is 78628217. The reversal of 78628165 is 56182687.

It is not a de Polignac number, because 78628165 - 2¹¹ = 78626117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49656 + ... + 51214.

It is an arithmetic number, because the mean of its divisors is an integer number (3706560).

Almost surely, 2^78628165 is an apocalyptic number.

It is an amenable number.

78628165 is a deficient number, since it is larger than the sum of its proper divisors (39981755).

78628165 is a wasteful number, since it uses less digits than its factorization.

78628165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its digits is 161280, while the sum is 43.

The square root of 78628165 is about 8867.2523929344. The cubic root of 78628165 is about 428.4097834577.

The spelling of 78628165 in words is "seventy-eight million, six hundred twenty-eight thousand, one hundred sixty-five".