428208031 has 2 divisors, whose sum is σ = 428208032. Its totient is φ = 428208030.

The previous prime is 428207947. The next prime is 428208037. The reversal of 428208031 is 130802824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428208031 - 2⁷ = 428207903 is a prime.

It is a super-2 number, since 2×428208031² = 366724235625793922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428208037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214104015 + 214104016.

It is an arithmetic number, because the mean of its divisors is an integer number (214104016).

Almost surely, 2^428208031 is an apocalyptic number.

428208031 is a deficient number, since it is larger than the sum of its proper divisors (1).

428208031 is an equidigital number, since it uses as much as digits as its factorization.

428208031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 428208031 is about 20693.1880337468. The cubic root of 428208031 is about 753.7342832388.

The spelling of 428208031 in words is "four hundred twenty-eight million, two hundred eight thousand, thirty-one".