428825807 has 2 divisors, whose sum is σ = 428825808. Its totient is φ = 428825806.

The previous prime is 428825741. The next prime is 428825827. The reversal of 428825807 is 708528824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428825807 - 2²² = 424631503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428825827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214412903 + 214412904.

It is an arithmetic number, because the mean of its divisors is an integer number (214412904).

Almost surely, 2^428825807 is an apocalyptic number.

428825807 is a deficient number, since it is larger than the sum of its proper divisors (1).

428825807 is an equidigital number, since it uses as much as digits as its factorization.

428825807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 286720, while the sum is 44.

The square root of 428825807 is about 20708.1096916160. The cubic root of 428825807 is about 754.0965800434.

The spelling of 428825807 in words is "four hundred twenty-eight million, eight hundred twenty-five thousand, eight hundred seven".