97805728 has 12 divisors (see below), whose sum is σ = 192555090. Its totient is φ = 48902848.

The previous prime is 97805717. The next prime is 97805737. The reversal of 97805728 is 82750879.

It can be written as a sum of positive squares in only one way, i.e., 95023504 + 2782224 = 9748^2 + 1668^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1528183 + ... + 1528246.

Almost surely, 2^97805728 is an apocalyptic number.

It is an amenable number.

97805728 is a deficient number, since it is larger than the sum of its proper divisors (94749362).

97805728 is a wasteful number, since it uses less digits than its factorization.

97805728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056439 (or 3056431 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 97805728 is about 9889.6778511739. The cubic root of 97805728 is about 460.7387750607.

The spelling of 97805728 in words is "ninety-seven million, eight hundred five thousand, seven hundred twenty-eight".