228787387 has 2 divisors, whose sum is σ = 228787388. Its totient is φ = 228787386.

The previous prime is 228787381. The next prime is 228787423. The reversal of 228787387 is 783787822.

It is a happy number.

228787387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228787387 is a prime.

It is not a weakly prime, because it can be changed into another prime (228787381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114393693 + 114393694.

It is an arithmetic number, because the mean of its divisors is an integer number (114393694).

Almost surely, 2^228787387 is an apocalyptic number.

228787387 is a deficient number, since it is larger than the sum of its proper divisors (1).

228787387 is an equidigital number, since it uses as much as digits as its factorization.

228787387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 52.

The square root of 228787387 is about 15125.7193878506. The cubic root of 228787387 is about 611.6139175317.

The spelling of 228787387 in words is "two hundred twenty-eight million, seven hundred eighty-seven thousand, three hundred eighty-seven".