909085638 has 8 divisors (see below), whose sum is σ = 1818171288. Its totient is φ = 303028544.

The previous prime is 909085631. The next prime is 909085643. The reversal of 909085638 is 836580909.

It is a sphenic number, since it is the product of 3 distinct primes.

909085638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909085631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75757131 + ... + 75757142.

It is an arithmetic number, because the mean of its divisors is an integer number (227271411).

Almost surely, 2^909085638 is an apocalyptic number.

909085638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

909085638 is a wasteful number, since it uses less digits than its factorization.

909085638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151514278.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 909085638 is about 30151.0470464957. The cubic root of 909085638 is about 968.7274338524.

The spelling of 909085638 in words is "nine hundred nine million, eighty-five thousand, six hundred thirty-eight".