428948087 has 2 divisors, whose sum is σ = 428948088. Its totient is φ = 428948086.

The previous prime is 428948081. The next prime is 428948129. The reversal of 428948087 is 780849824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428948087 - 2⁴ = 428948071 is a prime.

It is a super-2 number, since 2×428948087² = 367992922681919138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428948081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214474043 + 214474044.

It is an arithmetic number, because the mean of its divisors is an integer number (214474044).

Almost surely, 2^428948087 is an apocalyptic number.

428948087 is a deficient number, since it is larger than the sum of its proper divisors (1).

428948087 is an equidigital number, since it uses as much as digits as its factorization.

428948087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 428948087 is about 20711.0619476646. The cubic root of 428948087 is about 754.1682502997.

The spelling of 428948087 in words is "four hundred twenty-eight million, nine hundred forty-eight thousand, eighty-seven".