428550066 has 48 divisors (see below), whose sum is σ = 1068849600. Its totient is φ = 121557024.

The previous prime is 428550049. The next prime is 428550097. The reversal of 428550066 is 660055824.

428550066 is a `hidden beast` number, since 42 + 8 + 550 + 0 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 428550066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5280 + ... + 29748.

It is an arithmetic number, because the mean of its divisors is an integer number (22267700).

Almost surely, 2^428550066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428550066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534424800).

428550066 is an abundant number, since it is smaller than the sum of its proper divisors (640299534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428550066 is a wasteful number, since it uses less digits than its factorization.

428550066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24623 (or 24620 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 428550066 is about 20701.4508187228. The cubic root of 428550066 is about 753.9349138330.

The spelling of 428550066 in words is "four hundred twenty-eight million, five hundred fifty thousand, sixty-six".