1620264946 has 16 divisors (see below), whose sum is σ = 2537288064. Its totient is φ = 774536224.

The previous prime is 1620264929. The next prime is 1620264959. The reversal of 1620264946 is 6494620261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1620264899 and 1620264908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104190 + ... + 118726.

It is an arithmetic number, because the mean of its divisors is an integer number (158580504).

Almost surely, 2^1620264946 is an apocalyptic number.

1620264946 is a deficient number, since it is larger than the sum of its proper divisors (917023118).

1620264946 is a wasteful number, since it uses less digits than its factorization.

1620264946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16985.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1620264946 is about 40252.5147785825. The cubic root of 1620264946 is about 1174.5243153125.

The spelling of 1620264946 in words is "one billion, six hundred twenty million, two hundred sixty-four thousand, nine hundred forty-six".