1020728 has 8 divisors (see below), whose sum is σ = 1913880. Its totient is φ = 510360.

The previous prime is 1020709. The next prime is 1020743. The reversal of 1020728 is 8270201.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 63788 + ... + 63803.

It is an arithmetic number, because the mean of its divisors is an integer number (239235).

2^1020728 is an apocalyptic number.

It is an amenable number.

1020728 is a deficient number, since it is larger than the sum of its proper divisors (893152).

1020728 is a wasteful number, since it uses less digits than its factorization.

1020728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127597 (or 127593 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1020728 is about 1010.3108432557. The cubic root of 1020728 is about 100.6862136703.

Adding to 1020728 its reverse (8270201), we get a palindrome (9290929).

The spelling of 1020728 in words is "one million, twenty thousand, seven hundred twenty-eight".