1620226668 has 48 divisors (see below), whose sum is σ = 3824038400. Its totient is φ = 533879424.

The previous prime is 1620226631. The next prime is 1620226669. The reversal of 1620226668 is 8666220261.

It is not an unprimeable number, because it can be changed into a prime (1620226669) 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 15 ways as a sum of consecutive naturals, for example, 1157433 + ... + 1158831.

Almost surely, 2^1620226668 is an apocalyptic number.

It is an amenable number.

1620226668 is an abundant number, since it is smaller than the sum of its proper divisors (2203811732).

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

1620226668 is a wasteful number, since it uses less digits than its factorization.

1620226668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1620226668 is about 40252.0393023757. The cubic root of 1620226668 is about 1174.5150660442.

The spelling of 1620226668 in words is "one billion, six hundred twenty million, two hundred twenty-six thousand, six hundred sixty-eight".