1630909628 has 12 divisors (see below), whose sum is σ = 2946159552. Its totient is φ = 789149760.

The previous prime is 1630909601. The next prime is 1630909639. The reversal of 1630909628 is 8269090361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6576125 + ... + 6576372.

It is an arithmetic number, because the mean of its divisors is an integer number (245513296).

Almost surely, 2^1630909628 is an apocalyptic number.

It is an amenable number.

1630909628 is a deficient number, since it is larger than the sum of its proper divisors (1315249924).

1630909628 is a wasteful number, since it uses less digits than its factorization.

1630909628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13152532 (or 13152530 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1630909628 is about 40384.5221341048. The cubic root of 1630909628 is about 1177.0908005456.

Adding to 1630909628 its reverse (8269090361), we get a palindrome (9899999989).

The spelling of 1630909628 in words is "one billion, six hundred thirty million, nine hundred nine thousand, six hundred twenty-eight".