1630628 has 6 divisors (see below), whose sum is σ = 2853606. Its totient is φ = 815312.

The previous prime is 1630621. The next prime is 1630633. The reversal of 1630628 is 8260361.

It can be written as a sum of positive squares in only one way, i.e., 1420864 + 209764 = 1192^2 + 458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1630597 and 1630606.

It is not an unprimeable number, because it can be changed into a prime (1630621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203825 + ... + 203832.

It is an arithmetic number, because the mean of its divisors is an integer number (475601).

2^1630628 is an apocalyptic number.

It is an amenable number.

1630628 is a deficient number, since it is larger than the sum of its proper divisors (1222978).

1630628 is a wasteful number, since it uses less digits than its factorization.

1630628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407661 (or 407659 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1630628 is about 1276.9604535772. The cubic root of 1630628 is about 117.7023042691.

Adding to 1630628 its reverse (8260361), we get a palindrome (9890989).

The spelling of 1630628 in words is "one million, six hundred thirty thousand, six hundred twenty-eight".