428290871 has 2 divisors, whose sum is σ = 428290872. Its totient is φ = 428290870.

The previous prime is 428290847. The next prime is 428290883. The reversal of 428290871 is 178092824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428290871 - 2²² = 424096567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428299871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214145435 + 214145436.

It is an arithmetic number, because the mean of its divisors is an integer number (214145436).

Almost surely, 2^428290871 is an apocalyptic number.

428290871 is a deficient number, since it is larger than the sum of its proper divisors (1).

428290871 is an equidigital number, since it uses as much as digits as its factorization.

428290871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 428290871 is about 20695.1895618281. The cubic root of 428290871 is about 753.7828852558.

The spelling of 428290871 in words is "four hundred twenty-eight million, two hundred ninety thousand, eight hundred seventy-one".