1620323712 has 192 divisors, whose sum is σ = 5410080000. Its totient is φ = 455887872.

The previous prime is 1620323701. The next prime is 1620323713. The reversal of 1620323712 is 2173230261.

1620323712 is a `hidden beast` number, since 1 + 620 + 3 + 2 + 37 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620323713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 538789 + ... + 541787.

It is an arithmetic number, because the mean of its divisors is an integer number (28177500).

Almost surely, 2^1620323712 is an apocalyptic number.

1620323712 is a gapful number since it is divisible by the number (12) 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 1620323712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2705040000).

1620323712 is an abundant number, since it is smaller than the sum of its proper divisors (3789756288).

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

1620323712 is a wasteful number, since it uses less digits than its factorization.

1620323712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093 (or 3078 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1620323712 is about 40253.2447387785. The cubic root of 1620323712 is about 1174.5385148959.

Adding to 1620323712 its reverse (2173230261), we get a palindrome (3793553973).

The spelling of 1620323712 in words is "one billion, six hundred twenty million, three hundred twenty-three thousand, seven hundred twelve".