1652128840 has 64 divisors (see below), whose sum is σ = 3853882800. Its totient is φ = 636668928.

The previous prime is 1652128823. The next prime is 1652128853. The reversal of 1652128840 is 488212561.

It can be written as a sum of positive squares in 8 ways, for example, as 310957956 + 1341170884 = 17634^2 + 36622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1652128840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644842 + ... + 647398.

Almost surely, 2^1652128840 is an apocalyptic number.

1652128840 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 1652128840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926941400).

1652128840 is an abundant number, since it is smaller than the sum of its proper divisors (2201753960).

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

1652128840 is a wasteful number, since it uses less digits than its factorization.

1652128840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154 (or 3150 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 1652128840 is about 40646.3877853863. The cubic root of 1652128840 is about 1182.1737295018.

The spelling of 1652128840 in words is "one billion, six hundred fifty-two million, one hundred twenty-eight thousand, eight hundred forty".