228822397 has 6 divisors (see below), whose sum is σ = 243074618. Its totient is φ = 215361984.

The previous prime is 228822343. The next prime is 228822409. The reversal of 228822397 is 793228822.

It can be written as a sum of positive squares in 3 ways, for example, as 102799321 + 126023076 = 10139^2 + 11226^2 .

It is not a de Polignac number, because 228822397 - 2²³ = 220433789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228822317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395598 + ... + 396175.

Almost surely, 2^228822397 is an apocalyptic number.

It is an amenable number.

228822397 is a deficient number, since it is larger than the sum of its proper divisors (14252221).

228822397 is an equidigital number, since it uses as much as digits as its factorization.

228822397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791807 (or 791790 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 228822397 is about 15126.8766439077. The cubic root of 228822397 is about 611.6451131779.

The spelling of 228822397 in words is "two hundred twenty-eight million, eight hundred twenty-two thousand, three hundred ninety-seven".