97784128 has 28 divisors (see below), whose sum is σ = 208968340. Its totient is φ = 45130752.

The previous prime is 97784087. The next prime is 97784149. The reversal of 97784128 is 82148779.

It can be written as a sum of positive squares in 2 ways, for example, as 32626944 + 65157184 = 5712^2 + 8072^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57933 + ... + 59596.

It is an arithmetic number, because the mean of its divisors is an integer number (7463155).

Almost surely, 2^97784128 is an apocalyptic number.

It is an amenable number.

97784128 is an abundant number, since it is smaller than the sum of its proper divisors (111184212).

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

97784128 is a wasteful number, since it uses less digits than its factorization.

97784128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117554 (or 117544 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 97784128 is about 9888.5857431687. The cubic root of 97784128 is about 460.7048551310.

The spelling of 97784128 in words is "ninety-seven million, seven hundred eighty-four thousand, one hundred twenty-eight".