838720 has 28 divisors (see below), whose sum is σ = 1997964. Its totient is φ = 335360.

The previous prime is 838711. The next prime is 838751. The reversal of 838720 is 27838.

It is a happy number.

838720 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 331776 = 712^2 + 576^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991 + ... + 1630.

2⁸³⁸⁷²⁰ is an apocalyptic number.

838720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

838720 is an abundant number, since it is smaller than the sum of its proper divisors (1159244).

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

838720 is a wasteful number, since it uses less digits than its factorization.

838720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 838720 is about 915.8165755215. The cubic root of 838720 is about 94.3059294623.

The spelling of 838720 in words is "eight hundred thirty-eight thousand, seven hundred twenty".