428887111 has 2 divisors, whose sum is σ = 428887112. Its totient is φ = 428887110.

The previous prime is 428887099. The next prime is 428887213. The reversal of 428887111 is 111788824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428887111 - 2²³ = 420498503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428881111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214443555 + 214443556.

It is an arithmetic number, because the mean of its divisors is an integer number (214443556).

Almost surely, 2^428887111 is an apocalyptic number.

428887111 is a deficient number, since it is larger than the sum of its proper divisors (1).

428887111 is an equidigital number, since it uses as much as digits as its factorization.

428887111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28672, while the sum is 40.

The square root of 428887111 is about 20709.5898317663. The cubic root of 428887111 is about 754.1325129974.

The spelling of 428887111 in words is "four hundred twenty-eight million, eight hundred eighty-seven thousand, one hundred eleven".