2057728 has 20 divisors (see below), whose sum is σ = 4112460. Its totient is φ = 1028608.

The previous prime is 2057723. The next prime is 2057729. The reversal of 2057728 is 8277502.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 2057728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1498 + ... + 2521.

It is an arithmetic number, because the mean of its divisors is an integer number (205623).

2^2057728 is an apocalyptic number.

It is an amenable number.

2057728 is a deficient number, since it is larger than the sum of its proper divisors (2054732).

2057728 is an frugal number, since it uses more digits than its factorization.

2057728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037 (or 4021 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2057728 is about 1434.4783023803. The cubic root of 2057728 is about 127.1928374327.

The spelling of 2057728 in words is "two million, fifty-seven thousand, seven hundred twenty-eight".