1320628 has 12 divisors (see below), whose sum is σ = 2447172. Its totient is φ = 621440.

The previous prime is 1320623. The next prime is 1320667. The reversal of 1320628 is 8260231.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 128164 = 1092^2 + 358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320599 and 1320608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320623) 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, 9643 + ... + 9778.

It is an arithmetic number, because the mean of its divisors is an integer number (203931).

2^1320628 is an apocalyptic number.

It is an amenable number.

1320628 is a deficient number, since it is larger than the sum of its proper divisors (1126544).

1320628 is a wasteful number, since it uses less digits than its factorization.

1320628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442 (or 19440 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1320628 is about 1149.1857987288. The cubic root of 1320628 is about 109.7135245457.

Adding to 1320628 its reverse (8260231), we get a palindrome (9580859).

The spelling of 1320628 in words is "one million, three hundred twenty thousand, six hundred twenty-eight".