428506378178 has 16 divisors (see below), whose sum is σ = 652356370176. Its totient is φ = 211061388960.

The previous prime is 428506378177. The next prime is 428506378207. The reversal of 428506378178 is 871873605824.

It is a super-2 number, since 2×428506378178² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428506378177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1662938 + ... + 1903253.

It is an arithmetic number, because the mean of its divisors is an integer number (40772273136).

Almost surely, 2^428506378178 is an apocalyptic number.

428506378178 is a deficient number, since it is larger than the sum of its proper divisors (223849991998).

428506378178 is a wasteful number, since it uses less digits than its factorization.

428506378178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567089.

The product of its (nonzero) digits is 18063360, while the sum is 59.

The spelling of 428506378178 in words is "four hundred twenty-eight billion, five hundred six million, three hundred seventy-eight thousand, one hundred seventy-eight".