909638 has 8 divisors (see below), whose sum is σ = 1393632. Its totient is φ = 445096.

The previous prime is 909637. The next prime is 909679. The reversal of 909638 is 836909.

909638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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 = 909598 and 909607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909631) 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, 4745 + ... + 4932.

It is an arithmetic number, because the mean of its divisors is an integer number (174204).

2⁹⁰⁹⁶³⁸ is an apocalyptic number.

909638 is a deficient number, since it is larger than the sum of its proper divisors (483994).

909638 is a wasteful number, since it uses less digits than its factorization.

909638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9726.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 909638 is about 953.7494429880. The cubic root of 909638 is about 96.8923594281.

The spelling of 909638 in words is "nine hundred nine thousand, six hundred thirty-eight".