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427221666 = 23225799203
BaseRepresentation
bin11001011101101…
…110001010100010
31002202220002221200
4121131232022202
51333332043131
6110220502030
713405216134
oct3135561242
91082802850
10427221666
111aa178a63
12bb0aa916
136a682ab1
1440a4d054
152778e2e6
hex1976e2a2

427221666 has 24 divisors (see below), whose sum is σ = 926106480. Its totient is φ = 142336536.

The previous prime is 427221661. The next prime is 427221673. The reversal of 427221666 is 666122724.

It is a self number, because there is not a number n which added to its sum of digits gives 427221666.

It is not an unprimeable number, because it can be changed into a prime (427221661) 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, 41821 + ... + 51023.

It is an arithmetic number, because the mean of its divisors is an integer number (38587770).

Almost surely, 2427221666 is an apocalyptic number.

427221666 is an abundant number, since it is smaller than the sum of its proper divisors (498884814).

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

427221666 is a wasteful number, since it uses less digits than its factorization.

427221666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790 (or 11787 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 427221666 is about 20669.3412086597. The cubic root of 427221666 is about 753.1551031533.

The spelling of 427221666 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred sixty-six".

Divisors: 1 2 3 6 9 18 2579 5158 7737 9203 15474 18406 23211 27609 46422 55218 82827 165654 23734537 47469074 71203611 142407222 213610833 427221666