10628509 has 4 divisors (see below), whose sum is σ = 10915804. Its totient is φ = 10341216.

The previous prime is 10628479. The next prime is 10628521. The reversal of 10628509 is 90582601.

10628509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4502884 + 6125625 = 2122^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 10628509 - 2¹³ = 10620317 is a prime.

It is a super-2 number, since 2×10628509² = 225930407126162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10628539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143592 + ... + 143665.

It is an arithmetic number, because the mean of its divisors is an integer number (2728951).

Almost surely, 2^10628509 is an apocalyptic number.

It is an amenable number.

10628509 is a deficient number, since it is larger than the sum of its proper divisors (287295).

10628509 is an equidigital number, since it uses as much as digits as its factorization.

10628509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287294.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 10628509 is about 3260.1394141969. The cubic root of 10628509 is about 219.8656824741.

The spelling of 10628509 in words is "ten million, six hundred twenty-eight thousand, five hundred nine".