428805547 has 12 divisors (see below), whose sum is σ = 467173056. Its totient is φ = 393122160.

The previous prime is 428805407. The next prime is 428805551. The reversal of 428805547 is 745508824.

It is a happy number.

It is not a de Polignac number, because 428805547 - 2¹¹ = 428803499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428805557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7968 + ... + 30349.

It is an arithmetic number, because the mean of its divisors is an integer number (38931088).

Almost surely, 2^428805547 is an apocalyptic number.

428805547 is a deficient number, since it is larger than the sum of its proper divisors (38367509).

428805547 is a wasteful number, since it uses less digits than its factorization.

428805547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38386 (or 38367 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 428805547 is about 20707.6205055047. The cubic root of 428805547 is about 754.0847040189.

The spelling of 428805547 in words is "four hundred twenty-eight million, eight hundred five thousand, five hundred forty-seven".