228791807 has 2 divisors, whose sum is σ = 228791808. Its totient is φ = 228791806.

The previous prime is 228791791. The next prime is 228791851. The reversal of 228791807 is 708197822.

It is an a-pointer prime, because the next prime (228791851) can be obtained adding 228791807 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228791807 - 2⁴ = 228791791 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 (228791867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114395903 + 114395904.

It is an arithmetic number, because the mean of its divisors is an integer number (114395904).

Almost surely, 2^228791807 is an apocalyptic number.

228791807 is a deficient number, since it is larger than the sum of its proper divisors (1).

228791807 is an equidigital number, since it uses as much as digits as its factorization.

228791807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 228791807 is about 15125.8654958981. The cubic root of 228791807 is about 611.6178561464.

The spelling of 228791807 in words is "two hundred twenty-eight million, seven hundred ninety-one thousand, eight hundred seven".