2051728 has 30 divisors (see below), whose sum is σ = 4626006. Its totient is φ = 878976.

The previous prime is 2051719. The next prime is 2051743. The reversal of 2051728 is 8271502.

It can be written as a sum of positive squares in only one way, i.e., 2039184 + 12544 = 1428^2 + 112^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 525 + ... + 2092.

2^2051728 is an apocalyptic number.

2051728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2051728 is an abundant number, since it is smaller than the sum of its proper divisors (2574278).

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

2051728 is a wasteful number, since it uses less digits than its factorization.

2051728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639 (or 2626 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2051728 is about 1432.3854229920. The cubic root of 2051728 is about 127.0690925426.

The spelling of 2051728 in words is "two million, fifty-one thousand, seven hundred twenty-eight".