6428928 has 72 divisors (see below), whose sum is σ = 18690336. Its totient is φ = 1945600.

The previous prime is 6428921. The next prime is 6428957. The reversal of 6428928 is 8298246.

It is a super-2 number, since 2×6428928² = 82662230458368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6428921) 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, 8068 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (259588).

Almost surely, 2^6428928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6428928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9345168).

6428928 is an abundant number, since it is smaller than the sum of its proper divisors (12261408).

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

6428928 is a wasteful number, since it uses less digits than its factorization.

6428928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 777 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 6428928 is about 2535.5330800445. The cubic root of 6428928 is about 185.9428660222.

The spelling of 6428928 in words is "six million, four hundred twenty-eight thousand, nine hundred twenty-eight".