905804240 has 40 divisors (see below), whose sum is σ = 2297451168. Its totient is φ = 329383040.

The previous prime is 905804231. The next prime is 905804243. The reversal of 905804240 is 42408509.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 905804197 and 905804206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905804243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513782 + ... + 515541.

Almost surely, 2^905804240 is an apocalyptic number.

It is an amenable number.

905804240 is an abundant number, since it is smaller than the sum of its proper divisors (1391646928).

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

905804240 is a wasteful number, since it uses less digits than its factorization.

905804240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029347 (or 1029341 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 905804240 is about 30096.5818657202. The cubic root of 905804240 is about 967.5604691266.

The spelling of 905804240 in words is "nine hundred five million, eight hundred four thousand, two hundred forty".