97788636 has 36 divisors (see below), whose sum is σ = 269660664. Its totient is φ = 29632800.

The previous prime is 97788631. The next prime is 97788637. The reversal of 97788636 is 63688779.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97788631) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 123075 + ... + 123866.

It is an arithmetic number, because the mean of its divisors is an integer number (7490574).

Almost surely, 2^97788636 is an apocalyptic number.

It is an amenable number.

97788636 is an abundant number, since it is smaller than the sum of its proper divisors (171872028).

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

97788636 is a wasteful number, since it uses less digits than its factorization.

97788636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246962 (or 246957 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 97788636 is about 9888.8136801135. The cubic root of 97788636 is about 460.7119347584.

The spelling of 97788636 in words is "ninety-seven million, seven hundred eighty-eight thousand, six hundred thirty-six".