428842878 has 8 divisors (see below), whose sum is σ = 857685768. Its totient is φ = 142947624.

The previous prime is 428842877. The next prime is 428842879. The reversal of 428842878 is 878248824.

It is an interprime number because it is at equal distance from previous prime (428842877) and next prime (428842879).

It is a sphenic number, since it is the product of 3 distinct primes.

428842878 is an admirable number.

It is a super-2 number, since 2×428842878² = 367812428022645768, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 428842878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428842873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35736901 + ... + 35736912.

It is an arithmetic number, because the mean of its divisors is an integer number (107210721).

Almost surely, 2^428842878 is an apocalyptic number.

428842878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

428842878 is a wasteful number, since it uses less digits than its factorization.

428842878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71473818.

The product of its digits is 1835008, while the sum is 51.

The square root of 428842878 is about 20708.5218690277. The cubic root of 428842878 is about 754.1065864467.

The spelling of 428842878 in words is "four hundred twenty-eight million, eight hundred forty-two thousand, eight hundred seventy-eight".