427786489 has 27 divisors (see below), whose sum is σ = 487411533. Its totient is φ = 375272352.

The previous prime is 427786483. The next prime is 427786507. The reversal of 427786489 is 984687724.

It is a happy number.

The square root of 427786489 is 20683.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1776889 + 426009600 = 1333^2 + 20640^2 .

It is not a de Polignac number, because 427786489 - 2²¹ = 425689337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427786483) 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 26 ways as a sum of consecutive naturals, for example, 9948502 + ... + 9948544.

It is an arithmetic number, because the mean of its divisors is an integer number (18052279).

Almost surely, 2^427786489 is an apocalyptic number.

427786489 is the 20683-rd square number.

427786489 is the 10342-nd centered octagonal number.

It is an amenable number.

427786489 is a deficient number, since it is larger than the sum of its proper divisors (59625044).

427786489 is an equidigital number, since it uses as much as digits as its factorization.

427786489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 93 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 55.

The cubic root of 427786489 is about 753.4868684678.

It can be divided in two parts, 427786 and 489, that added together give a triangular number (428275 = T₉₂₅).

The spelling of 427786489 in words is "four hundred twenty-seven million, seven hundred eighty-six thousand, four hundred eighty-nine".