1605412320 has 96 divisors (see below), whose sum is σ = 5086543392. Its totient is φ = 425613312.

The previous prime is 1605412301. The next prime is 1605412321. The reversal of 1605412320 is 232145061.

1605412320 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605412321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73374 + ... + 92706.

It is an arithmetic number, because the mean of its divisors is an integer number (52984827).

Almost surely, 2^1605412320 is an apocalyptic number.

1605412320 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 1605412320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2543271696).

1605412320 is an abundant number, since it is smaller than the sum of its proper divisors (3481131072).

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

1605412320 is a wasteful number, since it uses less digits than its factorization.

1605412320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19524 (or 19516 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1605412320 is about 40067.5968832672. The cubic root of 1605412320 is about 1170.9244210010.

Adding to 1605412320 its reverse (232145061), we get a palindrome (1837557381).

The spelling of 1605412320 in words is "one billion, six hundred five million, four hundred twelve thousand, three hundred twenty".