2975728 has 30 divisors (see below), whose sum is σ = 6629784. Its totient is φ = 1267488.

The previous prime is 2975689. The next prime is 2975741. The reversal of 2975728 is 8275792.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18175 + ... + 18337.

2^2975728 is an apocalyptic number.

2975728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2975728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3314892).

2975728 is an abundant number, since it is smaller than the sum of its proper divisors (3654056).

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

2975728 is an equidigital number, since it uses as much as digits as its factorization.

2975728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 172 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 2975728 is about 1725.0298548141. The cubic root of 2975728 is about 143.8349446277.

It can be divided in two parts, 29 and 75728, that added together give a palindrome (75757).

The spelling of 2975728 in words is "two million, nine hundred seventy-five thousand, seven hundred twenty-eight".