404642082 has 64 divisors (see below), whose sum is σ = 928972800. Its totient is φ = 116533824.

The previous prime is 404642071. The next prime is 404642111. The reversal of 404642082 is 280246404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81919 + ... + 86717.

It is an arithmetic number, because the mean of its divisors is an integer number (14515200).

Almost surely, 2^404642082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404642082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464486400).

404642082 is an abundant number, since it is smaller than the sum of its proper divisors (524330718).

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

404642082 is a wasteful number, since it uses less digits than its factorization.

404642082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887.

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 404642082 is about 20115.7172877330. The cubic root of 404642082 is about 739.6456070276.

Adding to 404642082 its reverse (280246404), we get a palindrome (684888486).

The spelling of 404642082 in words is "four hundred four million, six hundred forty-two thousand, eighty-two".