1660428000 has 576 divisors, whose sum is σ = 7359206400. Its totient is φ = 344448000.

The previous prime is 1660427999. The next prime is 1660428019. The reversal of 1660428000 is 8240661.

It is a super-2 number, since 2×1660428000² = 5514042286368000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2771701 + ... + 2772299.

It is an arithmetic number, because the mean of its divisors is an integer number (12776400).

Almost surely, 2^1660428000 is an apocalyptic number.

1660428000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660428000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3679603200).

1660428000 is an abundant number, since it is smaller than the sum of its proper divisors (5698778400).

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

1660428000 is a wasteful number, since it uses less digits than its factorization.

1660428000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1660428000 is about 40748.3496598329. The cubic root of 1660428000 is about 1184.1499003661.

Adding to 1660428000 its reverse (8240661), we get a palindrome (1668668661).

The spelling of 1660428000 in words is "one billion, six hundred sixty million, four hundred twenty-eight thousand".