1646468928 has 84 divisors (see below), whose sum is σ = 5082352548. Its totient is φ = 506603520.

The previous prime is 1646468899. The next prime is 1646468933. The reversal of 1646468928 is 8298646461.

It can be written as a sum of positive squares in 2 ways, for example, as 826677504 + 819791424 = 28752^2 + 28632^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102453 + ... + 117428.

It is an arithmetic number, because the mean of its divisors is an integer number (60504197).

Almost surely, 2^1646468928 is an apocalyptic number.

1646468928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1646468928 is an abundant number, since it is smaller than the sum of its proper divisors (3435883620).

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

1646468928 is a wasteful number, since it uses less digits than its factorization.

1646468928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219912 (or 219899 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 1646468928 is about 40576.7042525634. The cubic root of 1646468928 is about 1180.8222096865.

The spelling of 1646468928 in words is "one billion, six hundred forty-six million, four hundred sixty-eight thousand, nine hundred twenty-eight".