1628488256 has 14 divisors (see below), whose sum is σ = 3231531510. Its totient is φ = 814244096.

The previous prime is 1628488237. The next prime is 1628488273. The reversal of 1628488256 is 6528848261.

It can be written as a sum of positive squares in only one way, i.e., 1524121600 + 104366656 = 39040^2 + 10216^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722501 + ... + 12722628.

Almost surely, 2^1628488256 is an apocalyptic number.

1628488256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1628488256 is a deficient number, since it is larger than the sum of its proper divisors (1603043254).

1628488256 is an equidigital number, since it uses as much as digits as its factorization.

1628488256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25445141 (or 25445131 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 50.

The square root of 1628488256 is about 40354.5320379261. The cubic root of 1628488256 is about 1176.5079792885.

The spelling of 1628488256 in words is "one billion, six hundred twenty-eight million, four hundred eighty-eight thousand, two hundred fifty-six".