1620663630 has 32 divisors (see below), whose sum is σ = 3894355584. Its totient is φ = 431647776.

The previous prime is 1620663617. The next prime is 1620663659. The reversal of 1620663630 is 363660261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1620663591 and 1620663600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7852 + ... + 57471.

It is an arithmetic number, because the mean of its divisors is an integer number (121698612).

Almost surely, 2^1620663630 is an apocalyptic number.

1620663630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620663630 is an abundant number, since it is smaller than the sum of its proper divisors (2273691954).

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

1620663630 is a wasteful number, since it uses less digits than its factorization.

1620663630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66160.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 1620663630 is about 40257.4667608383. The cubic root of 1620663630 is about 1174.6206422849.

The spelling of 1620663630 in words is "one billion, six hundred twenty million, six hundred sixty-three thousand, six hundred thirty".