428905775 has 6 divisors (see below), whose sum is σ = 531843192. Its totient is φ = 343124600.

The previous prime is 428905759. The next prime is 428905781. The reversal of 428905775 is 577509824.

It is a happy number.

It is not a de Polignac number, because 428905775 - 2⁴ = 428905759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8578091 + ... + 8578140.

It is an arithmetic number, because the mean of its divisors is an integer number (88640532).

Almost surely, 2^428905775 is an apocalyptic number.

428905775 is a deficient number, since it is larger than the sum of its proper divisors (102937417).

428905775 is a wasteful number, since it uses less digits than its factorization.

428905775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17156241 (or 17156236 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 428905775 is about 20710.0404393618. The cubic root of 428905775 is about 754.1434521036.

The spelling of 428905775 in words is "four hundred twenty-eight million, nine hundred five thousand, seven hundred seventy-five".