427588778 has 4 divisors (see below), whose sum is σ = 641383170. Its totient is φ = 213794388.

The previous prime is 427588771. The next prime is 427588801. The reversal of 427588778 is 877885724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 406949929 + 20638849 = 20173^2 + 4543^2 .

It is not an unprimeable number, because it can be changed into a prime (427588771) 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 as a sum of consecutive naturals, namely, 106897193 + ... + 106897196.

Almost surely, 2^427588778 is an apocalyptic number.

427588778 is a deficient number, since it is larger than the sum of its proper divisors (213794392).

427588778 is a wasteful number, since it uses less digits than its factorization.

427588778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213794391.

The product of its digits is 7024640, while the sum is 56.

The square root of 427588778 is about 20678.2198943720. The cubic root of 427588778 is about 753.3707703657.

The spelling of 427588778 in words is "four hundred twenty-seven million, five hundred eighty-eight thousand, seven hundred seventy-eight".