838621 has 8 divisors (see below), whose sum is σ = 979200. Its totient is φ = 703248.

The previous prime is 838613. The next prime is 838631. The reversal of 838621 is 126838.

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

It is not a de Polignac number, because 838621 - 2³ = 838613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 838621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2⁸³⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

838621 is a deficient number, since it is larger than the sum of its proper divisors (140579).

838621 is a wasteful number, since it uses less digits than its factorization.

838621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603.

The product of its digits is 2304, while the sum is 28.

The square root of 838621 is about 915.7625238019. The cubic root of 838621 is about 94.3022187864.

The spelling of 838621 in words is "eight hundred thirty-eight thousand, six hundred twenty-one".