1605223332 has 60 divisors (see below), whose sum is σ = 4209877980. Its totient is φ = 533352384.

The previous prime is 1605223331. The next prime is 1605223343. The reversal of 1605223332 is 2333225061.

1605223332 is a `hidden beast` number, since 1 + 605 + 2 + 23 + 3 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 967458816 + 637764516 = 31104^2 + 25254^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1605223296 and 1605223305.

It is not an unprimeable number, because it can be changed into a prime (1605223331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94894 + ... + 110522.

It is an arithmetic number, because the mean of its divisors is an integer number (70164633).

Almost surely, 2^1605223332 is an apocalyptic number.

1605223332 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 1605223332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2104938990).

1605223332 is an abundant number, since it is smaller than the sum of its proper divisors (2604654648).

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

1605223332 is a wasteful number, since it uses less digits than its factorization.

1605223332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15962 (or 15951 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 1605223332 is about 40065.2384493091. The cubic root of 1605223332 is about 1170.8784724004.

Adding to 1605223332 its reverse (2333225061), we get a palindrome (3938448393).

The spelling of 1605223332 in words is "one billion, six hundred five million, two hundred twenty-three thousand, three hundred thirty-two".