6428898 has 72 divisors (see below), whose sum is σ = 16725852. Its totient is φ = 1778112.

The previous prime is 6428879. The next prime is 6428921. The reversal of 6428898 is 8988246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4678569 + 1750329 = 2163^2 + 1323^2 .

Its product of digits (221184) is a multiple of the sum of its prime factors (256).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32536 + ... + 32732.

Almost surely, 2^6428898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6428898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8362926).

6428898 is an abundant number, since it is smaller than the sum of its proper divisors (10296954).

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

6428898 is a wasteful number, since it uses less digits than its factorization.

6428898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 246 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 6428898 is about 2535.5271641219. The cubic root of 6428898 is about 185.9425767933.

The spelling of 6428898 in words is "six million, four hundred twenty-eight thousand, eight hundred ninety-eight".