97772228 has 12 divisors (see below), whose sum is σ = 171244332. Its totient is φ = 48845280.

The previous prime is 97772201. The next prime is 97772231. The reversal of 97772228 is 82227779.

It can be written as a sum of positive squares in 2 ways, for example, as 58859584 + 38912644 = 7672^2 + 6238^2 .

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, 4463 + ... + 14678.

It is an arithmetic number, because the mean of its divisors is an integer number (14270361).

Almost surely, 2^97772228 is an apocalyptic number.

It is an amenable number.

97772228 is a deficient number, since it is larger than the sum of its proper divisors (73472104).

97772228 is a wasteful number, since it uses less digits than its factorization.

97772228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20422 (or 20420 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 97772228 is about 9887.9840210227. The cubic root of 97772228 is about 460.6861656283.

The spelling of 97772228 in words is "ninety-seven million, seven hundred seventy-two thousand, two hundred twenty-eight".