427809564 has 72 divisors (see below), whose sum is σ = 1330973280. Its totient is φ = 112828032.

The previous prime is 427809527. The next prime is 427809601. The reversal of 427809564 is 465908724.

It is a happy number.

427809564 is a `hidden beast` number, since 4 + 2 + 7 + 80 + 9 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (427809527) and next prime (427809601).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62019 + ... + 68570.

It is an arithmetic number, because the mean of its divisors is an integer number (18485740).

Almost surely, 2^427809564 is an apocalyptic number.

It is an amenable number.

427809564 is an abundant number, since it is smaller than the sum of its proper divisors (903163716).

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

427809564 is a wasteful number, since it uses less digits than its factorization.

427809564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130619 (or 130614 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 427809564 is about 20683.5578177450. The cubic root of 427809564 is about 753.5004160337.

The spelling of 427809564 in words is "four hundred twenty-seven million, eight hundred nine thousand, five hundred sixty-four".