1650650320 has 80 divisors (see below), whose sum is σ = 4205445120. Its totient is φ = 597542400.

The previous prime is 1650650311. The next prime is 1650650347. The reversal of 1650650320 is 230560561.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1650650320² = 5449292957832204800, 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 15 ways as a sum of consecutive naturals, for example, 197425 + ... + 205615.

It is an arithmetic number, because the mean of its divisors is an integer number (52568064).

Almost surely, 2^1650650320 is an apocalyptic number.

1650650320 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 1650650320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102722560).

1650650320 is an abundant number, since it is smaller than the sum of its proper divisors (2554794800).

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

1650650320 is a wasteful number, since it uses less digits than its factorization.

1650650320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8444 (or 8438 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 1650650320 is about 40628.1961204285. The cubic root of 1650650320 is about 1181.8209746966.

The spelling of 1650650320 in words is "one billion, six hundred fifty million, six hundred fifty thousand, three hundred twenty".