83821404 has 24 divisors (see below), whose sum is σ = 196680960. Its totient is φ = 27783664.

The previous prime is 83821403. The next prime is 83821411. The reversal of 83821404 is 40412838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83821403) 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, 17364 + ... + 21659.

It is an arithmetic number, because the mean of its divisors is an integer number (8195040).

Almost surely, 2^83821404 is an apocalyptic number.

It is an amenable number.

83821404 is an abundant number, since it is smaller than the sum of its proper divisors (112859556).

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

83821404 is a wasteful number, since it uses less digits than its factorization.

83821404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39209 (or 39207 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 83821404 is about 9155.4029949533. The cubic root of 83821404 is about 437.6413109780.

The spelling of 83821404 in words is "eighty-three million, eight hundred twenty-one thousand, four hundred four".