10728621 has 6 divisors (see below), whose sum is σ = 15496910. Its totient is φ = 7152408.

The previous prime is 10728611. The next prime is 10728623. The reversal of 10728621 is 12682701.

10728621 is a `hidden beast` number, since 10 + 7 + 28 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10692900 + 35721 = 3270^2 + 189^2 .

It is not a de Polignac number, because 10728621 - 2⁵ = 10728589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10728623) by changing a digit.

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, 596026 + ... + 596043.

Almost surely, 2^10728621 is an apocalyptic number.

It is an amenable number.

10728621 is a deficient number, since it is larger than the sum of its proper divisors (4768289).

10728621 is a wasteful number, since it uses less digits than its factorization.

10728621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192075 (or 1192072 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 10728621 is about 3275.4573726428. The cubic root of 10728621 is about 220.5538455817.

The spelling of 10728621 in words is "ten million, seven hundred twenty-eight thousand, six hundred twenty-one".