97644678 has 8 divisors (see below), whose sum is σ = 195289368. Its totient is φ = 32548224.

The previous prime is 97644647. The next prime is 97644691. The reversal of 97644678 is 87644679.

It is a sphenic number, since it is the product of 3 distinct primes.

97644678 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 97644678.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8137051 + ... + 8137062.

It is an arithmetic number, because the mean of its divisors is an integer number (24411171).

Almost surely, 2^97644678 is an apocalyptic number.

97644678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97644678 is a wasteful number, since it uses less digits than its factorization.

97644678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16274118.

The product of its digits is 2032128, while the sum is 51.

The square root of 97644678 is about 9881.5321686467. The cubic root of 97644678 is about 460.4857471235.

Subtracting from 97644678 its reverse (87644679), we obtain a palindrome (9999999).

It can be divided in two parts, 976 and 44678, that added together give a palindrome (45654).

The spelling of 97644678 in words is "ninety-seven million, six hundred forty-four thousand, six hundred seventy-eight".