909438 has 8 divisors (see below), whose sum is σ = 1818888. Its totient is φ = 303144.

The previous prime is 909437. The next prime is 909451. The reversal of 909438 is 834909.

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

909438 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 909399 and 909408.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 909438.

It is not an unprimeable number, because it can be changed into a prime (909437) 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, 75781 + ... + 75792.

It is an arithmetic number, because the mean of its divisors is an integer number (227361).

2⁹⁰⁹⁴³⁸ is an apocalyptic number.

909438 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.

909438 is a wasteful number, since it uses less digits than its factorization.

909438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151578.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 909438 is about 953.6445878838. The cubic root of 909438 is about 96.8852577414.

Subtracting from 909438 its reverse (834909), we obtain a square (74529 = 273²).

It can be divided in two parts, 90943 and 8, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 909438 in words is "nine hundred nine thousand, four hundred thirty-eight".