1620002008 has 16 divisors (see below), whose sum is σ = 3039616080. Its totient is φ = 809437728.

The previous prime is 1620001993. The next prime is 1620002011. The reversal of 1620002008 is 8002000261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58060 + ... + 81307.

It is an arithmetic number, because the mean of its divisors is an integer number (189976005).

Almost surely, 2^1620002008 is an apocalyptic number.

It is an amenable number.

1620002008 is a deficient number, since it is larger than the sum of its proper divisors (1419614072).

1620002008 is a wasteful number, since it uses less digits than its factorization.

1620002008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140826 (or 140822 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1620002008 is about 40249.2485395690. The cubic root of 1620002008 is about 1174.4607776007.

Adding to 1620002008 its reverse (8002000261), we get a palindrome (9622002269).

The spelling of 1620002008 in words is "one billion, six hundred twenty million, two thousand, eight".