428178123178 has 24 divisors (see below), whose sum is σ = 712435523436. Its totient is φ = 192800649600.

The previous prime is 428178123103. The next prime is 428178123209. The reversal of 428178123178 is 871321871824.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 86085320409 + 342092802769 = 293403^2 + 584887^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15434913 + ... + 15462628.

Almost surely, 2^428178123178 is an apocalyptic number.

428178123178 is a deficient number, since it is larger than the sum of its proper divisors (284257400258).

428178123178 is a wasteful number, since it uses less digits than its factorization.

428178123178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30897610 (or 30897597 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 52.

The spelling of 428178123178 in words is "four hundred twenty-eight billion, one hundred seventy-eight million, one hundred twenty-three thousand, one hundred seventy-eight".