905633840 has 20 divisors (see below), whose sum is σ = 2105598864. Its totient is φ = 362253504.

The previous prime is 905633821. The next prime is 905633849. The reversal of 905633840 is 48336509.

905633840 is digitally balanced in base 2, 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 905633794 and 905633803.

It is not an unprimeable number, because it can be changed into a prime (905633849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5660132 + ... + 5660291.

Almost surely, 2^905633840 is an apocalyptic number.

It is an amenable number.

905633840 is an abundant number, since it is smaller than the sum of its proper divisors (1199965024).

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

905633840 is a wasteful number, since it uses less digits than its factorization.

905633840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11320436 (or 11320430 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 905633840 is about 30093.7508463136. The cubic root of 905633840 is about 967.4997927920.

The spelling of 905633840 in words is "nine hundred five million, six hundred thirty-three thousand, eight hundred forty".