78630769 has 16 divisors (see below), whose sum is σ = 92244096. Its totient is φ = 65635200.

The previous prime is 78630737. The next prime is 78630791. The reversal of 78630769 is 96703687.

It is a cyclic number.

It is not a de Polignac number, because 78630769 - 2⁵ = 78630737 is a prime.

It is a super-2 number, since 2×78630769² = 12365595667062722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78630869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44829 + ... + 46549.

It is an arithmetic number, because the mean of its divisors is an integer number (5765256).

Almost surely, 2^78630769 is an apocalyptic number.

It is an amenable number.

78630769 is a deficient number, since it is larger than the sum of its proper divisors (13613327).

78630769 is a wasteful number, since it uses less digits than its factorization.

78630769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 78630769 is about 8867.3992241243. The cubic root of 78630769 is about 428.4145127501.

The spelling of 78630769 in words is "seventy-eight million, six hundred thirty thousand, seven hundred sixty-nine".