1620967922 has 42 divisors (see below), whose sum is σ = 2871279183. Its totient is φ = 686330652.

The previous prime is 1620967921. The next prime is 1620967927. The reversal of 1620967922 is 2297690261.

It can be written as a sum of positive squares in only one way, i.e., 810483961 + 810483961 = 28469^2 + 28469^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=28469.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620967921) by changing a digit.

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 20 ways as a sum of consecutive naturals, for example, 19529693 + ... + 19529775.

Almost surely, 2^1620967922 is an apocalyptic number.

1620967922 is a deficient number, since it is larger than the sum of its proper divisors (1250311261).

1620967922 is an frugal number, since it uses more digits than its factorization.

1620967922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 1620967922 is about 40261.2459071996. The cubic root of 1620967922 is about 1174.6941523562.

The spelling of 1620967922 in words is "one billion, six hundred twenty million, nine hundred sixty-seven thousand, nine hundred twenty-two".