97797128 has 32 divisors (see below), whose sum is σ = 215429760. Its totient is φ = 41033280.

The previous prime is 97797121. The next prime is 97797131. The reversal of 97797128 is 82179779.

It is not an unprimeable number, because it can be changed into a prime (97797121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41600 + ... + 43887.

It is an arithmetic number, because the mean of its divisors is an integer number (6732180).

Almost surely, 2^97797128 is an apocalyptic number.

It is an amenable number.

97797128 is an abundant number, since it is smaller than the sum of its proper divisors (117632632).

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

97797128 is a wasteful number, since it uses less digits than its factorization.

97797128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85517 (or 85513 counting only the distinct ones).

The product of its digits is 444528, while the sum is 50.

The square root of 97797128 is about 9889.2430448442. The cubic root of 97797128 is about 460.7252705019.

The spelling of 97797128 in words is "ninety-seven million, seven hundred ninety-seven thousand, one hundred twenty-eight".