1605405234 has 16 divisors (see below), whose sum is σ = 3399681888. Its totient is φ = 503656512.

The previous prime is 1605405199. The next prime is 1605405239. The reversal of 1605405234 is 4325045061.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1605405239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7869532 + ... + 7869735.

It is an arithmetic number, because the mean of its divisors is an integer number (212480118).

Almost surely, 2^1605405234 is an apocalyptic number.

1605405234 is an abundant number, since it is smaller than the sum of its proper divisors (1794276654).

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

1605405234 is a wasteful number, since it uses less digits than its factorization.

1605405234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15739289.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1605405234 is about 40067.5084576019. The cubic root of 1605405234 is about 1170.9226982488.

The spelling of 1605405234 in words is "one billion, six hundred five million, four hundred five thousand, two hundred thirty-four".