905322640 has 160 divisors (see below), whose sum is σ = 2312352000. Its totient is φ = 328458240.

The previous prime is 905322629. The next prime is 905322683. The reversal of 905322640 is 46223509.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4549261 + ... + 4549459.

It is an arithmetic number, because the mean of its divisors is an integer number (14452200).

Almost surely, 2^905322640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 905322640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156176000).

905322640 is an abundant number, since it is smaller than the sum of its proper divisors (1407029360).

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

905322640 is a wasteful number, since it uses less digits than its factorization.

905322640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 905322640 is about 30088.5798933748. The cubic root of 905322640 is about 967.3889604976.

The spelling of 905322640 in words is "nine hundred five million, three hundred twenty-two thousand, six hundred forty".