6128728 has 8 divisors (see below), whose sum is σ = 11491380. Its totient is φ = 3064360.

The previous prime is 6128723. The next prime is 6128729. The reversal of 6128728 is 8278216.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6128728² = 75122613795968, which contains 22 as substring.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 6128693 and 6128702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6128723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383038 + ... + 383053.

Almost surely, 2^6128728 is an apocalyptic number.

It is an amenable number.

6128728 is a deficient number, since it is larger than the sum of its proper divisors (5362652).

6128728 is a wasteful number, since it uses less digits than its factorization.

6128728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766097 (or 766093 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 6128728 is about 2475.6267893202. The cubic root of 6128728 is about 183.0023987662.

The spelling of 6128728 in words is "six million, one hundred twenty-eight thousand, seven hundred twenty-eight".