228440957 has 2 divisors, whose sum is σ = 228440958. Its totient is φ = 228440956.

The previous prime is 228440941. The next prime is 228440969. The reversal of 228440957 is 759044822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170589721 + 57851236 = 13061^2 + 7606^2 .

It is a cyclic number.

It is not a de Polignac number, because 228440957 - 2⁴ = 228440941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228440357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114220478 + 114220479.

It is an arithmetic number, because the mean of its divisors is an integer number (114220479).

Almost surely, 2^228440957 is an apocalyptic number.

It is an amenable number.

228440957 is a deficient number, since it is larger than the sum of its proper divisors (1).

228440957 is an equidigital number, since it uses as much as digits as its factorization.

228440957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 228440957 is about 15114.2633627974. The cubic root of 228440957 is about 611.3050595334.

The spelling of 228440957 in words is "two hundred twenty-eight million, four hundred forty thousand, nine hundred fifty-seven".