1620256832 has 14 divisors (see below), whose sum is σ = 3215197278. Its totient is φ = 810128384.

The previous prime is 1620256829. The next prime is 1620256853. The reversal of 1620256832 is 2386520261.

It can be written as a sum of positive squares in only one way, i.e., 832668736 + 787588096 = 28856^2 + 28064^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1620256792 and 1620256801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12658193 + ... + 12658320.

Almost surely, 2^1620256832 is an apocalyptic number.

It is an amenable number.

1620256832 is a deficient number, since it is larger than the sum of its proper divisors (1594940446).

1620256832 is an equidigital number, since it uses as much as digits as its factorization.

1620256832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25316525 (or 25316515 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1620256832 is about 40252.4139897224. The cubic root of 1620256832 is about 1174.5223547060.

The spelling of 1620256832 in words is "one billion, six hundred twenty million, two hundred fifty-six thousand, eight hundred thirty-two".