838740 has 48 divisors (see below), whose sum is σ = 2685312. Its totient is φ = 191616.

The previous prime is 838711. The next prime is 838751. The reversal of 838740 is 47838.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 838698 and 838707.

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 838740.

It is an unprimeable number.

838740 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579 + ... + 1418.

It is an arithmetic number, because the mean of its divisors is an integer number (55944).

2⁸³⁸⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

838740 is an abundant number, since it is smaller than the sum of its proper divisors (1846572).

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

838740 is a wasteful number, since it uses less digits than its factorization.

838740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 838740 is about 915.8274946735. The cubic root of 838740 is about 94.3066790584.

The spelling of 838740 in words is "eight hundred thirty-eight thousand, seven hundred forty".