428170951878 has 16 divisors (see below), whose sum is σ = 885870935280. Its totient is φ = 137802145376.

The previous prime is 428170951837. The next prime is 428170951937. The reversal of 428170951878 is 878159071824.

It is a super-2 number, since 2×428170951878² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230376125 + ... + 1230376472.

It is an arithmetic number, because the mean of its divisors is an integer number (55366933455).

Almost surely, 2^428170951878 is an apocalyptic number.

428170951878 is an abundant number, since it is smaller than the sum of its proper divisors (457699983402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428170951878 is a wasteful number, since it uses less digits than its factorization.

428170951878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460752631.

The product of its (nonzero) digits is 9031680, while the sum is 60.

The spelling of 428170951878 in words is "four hundred twenty-eight billion, one hundred seventy million, nine hundred fifty-one thousand, eight hundred seventy-eight".