428285831 has 2 divisors, whose sum is σ = 428285832. Its totient is φ = 428285830.

The previous prime is 428285747. The next prime is 428285839. The reversal of 428285831 is 138582824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428285831 - 2¹⁴ = 428269447 is a prime.

It is a super-2 number, since 2×428285831² = 366857506070721122, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428285839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214142915 + 214142916.

It is an arithmetic number, because the mean of its divisors is an integer number (214142916).

Almost surely, 2^428285831 is an apocalyptic number.

428285831 is a deficient number, since it is larger than the sum of its proper divisors (1).

428285831 is an equidigital number, since it uses as much as digits as its factorization.

428285831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 41.

The square root of 428285831 is about 20695.0677940421. The cubic root of 428285831 is about 753.7799284797.

The spelling of 428285831 in words is "four hundred twenty-eight million, two hundred eighty-five thousand, eight hundred thirty-one".