821837382 has 16 divisors (see below), whose sum is σ = 1644287040. Its totient is φ = 273843752.

The previous prime is 821837329. The next prime is 821837389. The reversal of 821837382 is 283738128.

It is a super-2 number, since 2×821837382² = 1350833364905227848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821837389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7032 + ... + 41147.

It is an arithmetic number, because the mean of its divisors is an integer number (102767940).

Almost surely, 2^821837382 is an apocalyptic number.

821837382 is an abundant number, since it is smaller than the sum of its proper divisors (822449658).

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

821837382 is a wasteful number, since it uses less digits than its factorization.

821837382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51027.

The product of its digits is 129024, while the sum is 42.

The square root of 821837382 is about 28667.7062563436. The cubic root of 821837382 is about 936.6887349036.

The spelling of 821837382 in words is "eight hundred twenty-one million, eight hundred thirty-seven thousand, three hundred eighty-two".