1628378466 has 64 divisors (see below), whose sum is σ = 3898419840. Its totient is φ = 446883840.

The previous prime is 1628378429. The next prime is 1628378501. The reversal of 1628378466 is 6648738261.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 27570 + ... + 63378.

It is an arithmetic number, because the mean of its divisors is an integer number (60912810).

Almost surely, 2^1628378466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628378466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949209920).

1628378466 is an abundant number, since it is smaller than the sum of its proper divisors (2270041374).

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

1628378466 is a wasteful number, since it uses less digits than its factorization.

1628378466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35891.

The product of its digits is 2322432, while the sum is 51.

The square root of 1628378466 is about 40353.1716969063. The cubic root of 1628378466 is about 1176.4815392833.

It can be divided in two parts, 16283 and 78466, that added together give a palindrome (94749).

The spelling of 1628378466 in words is "one billion, six hundred twenty-eight million, three hundred seventy-eight thousand, four hundred sixty-six".