97728786 has 24 divisors (see below), whose sum is σ = 213417984. Its totient is φ = 32319000.

The previous prime is 97728749. The next prime is 97728793. The reversal of 97728786 is 68782779.

It is a super-2 number, since 2×97728786² = 19101831226067592, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 19090 + ... + 23661.

It is an arithmetic number, because the mean of its divisors is an integer number (8892416).

Almost surely, 2^97728786 is an apocalyptic number.

97728786 is an abundant number, since it is smaller than the sum of its proper divisors (115689198).

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

97728786 is a wasteful number, since it uses less digits than its factorization.

97728786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42886 (or 42883 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 97728786 is about 9885.7870703349. The cubic root of 97728786 is about 460.6179250736.

The spelling of 97728786 in words is "ninety-seven million, seven hundred twenty-eight thousand, seven hundred eighty-six".