427064778 has 64 divisors (see below), whose sum is σ = 1105125120. Its totient is φ = 119710656.

The previous prime is 427064761. The next prime is 427064779. The reversal of 427064778 is 877460724.

It is not an unprimeable number, because it can be changed into a prime (427064779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9376 + ... + 30692.

It is an arithmetic number, because the mean of its divisors is an integer number (17267580).

Almost surely, 2^427064778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427064778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552562560).

427064778 is an abundant number, since it is smaller than the sum of its proper divisors (678060342).

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

427064778 is a wasteful number, since it uses less digits than its factorization.

427064778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21388 (or 21382 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The square root of 427064778 is about 20665.5456738989. The cubic root of 427064778 is about 753.0628985093.

The spelling of 427064778 in words is "four hundred twenty-seven million, sixty-four thousand, seven hundred seventy-eight".