1620926056 has 8 divisors (see below), whose sum is σ = 3039236370. Its totient is φ = 810463024.

The previous prime is 1620926053. The next prime is 1620926077. The reversal of 1620926056 is 6506290261.

It can be written as a sum of positive squares in only one way, i.e., 958893156 + 662032900 = 30966^2 + 25730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1620926053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101307871 + ... + 101307886.

Almost surely, 2^1620926056 is an apocalyptic number.

It is an amenable number.

1620926056 is a deficient number, since it is larger than the sum of its proper divisors (1418310314).

1620926056 is a wasteful number, since it uses less digits than its factorization.

1620926056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202615763 (or 202615759 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1620926056 is about 40260.7259745773. The cubic root of 1620926056 is about 1174.6840390224.

The spelling of 1620926056 in words is "one billion, six hundred twenty million, nine hundred twenty-six thousand, fifty-six".