428269178 has 4 divisors (see below), whose sum is σ = 642403770. Its totient is φ = 214134588.

The previous prime is 428269111. The next prime is 428269181. The reversal of 428269178 is 871962824.

It is a happy number.

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., 332953009 + 95316169 = 18247^2 + 9763^2 .

It is a super-4 number, since 4×428269178⁴ (a number of 36 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 107067293 + ... + 107067296.

Almost surely, 2^428269178 is an apocalyptic number.

428269178 is a deficient number, since it is larger than the sum of its proper divisors (214134592).

428269178 is a wasteful number, since it uses less digits than its factorization.

428269178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214134591.

The product of its digits is 387072, while the sum is 47.

The square root of 428269178 is about 20694.6654478878. The cubic root of 428269178 is about 753.7701586337.

The spelling of 428269178 in words is "four hundred twenty-eight million, two hundred sixty-nine thousand, one hundred seventy-eight".