1209628 has 12 divisors (see below), whose sum is σ = 2419312. Its totient is φ = 518400.

The previous prime is 1209617. The next prime is 1209629. The reversal of 1209628 is 8269021.

It is a happy number.

1209628 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 43201 = 1209628 / (1 + 2 + 0 + 9 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1209596 and 1209605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209629) 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, 21573 + ... + 21628.

2^1209628 is an apocalyptic number.

It is an amenable number.

1209628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1209628 is a wasteful number, since it uses less digits than its factorization.

1209628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43212 (or 43210 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1209628 is about 1099.8308960927. The cubic root of 1209628 is about 106.5493023361.

The spelling of 1209628 in words is "one million, two hundred nine thousand, six hundred twenty-eight".