78630671 has 16 divisors (see below), whose sum is σ = 92313600. Its totient is φ = 65577600.

The previous prime is 78630667. The next prime is 78630707. The reversal of 78630671 is 17603687.

It is a cyclic number.

It is not a de Polignac number, because 78630671 - 2² = 78630667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78630611) 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, 64871 + ... + 66071.

It is an arithmetic number, because the mean of its divisors is an integer number (5769600).

Almost surely, 2^78630671 is an apocalyptic number.

78630671 is a deficient number, since it is larger than the sum of its proper divisors (13682929).

78630671 is a wasteful number, since it uses less digits than its factorization.

78630671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 78630671 is about 8867.3936982633. The cubic root of 78630671 is about 428.4143347679.

The spelling of 78630671 in words is "seventy-eight million, six hundred thirty thousand, six hundred seventy-one".