404050842 has 80 divisors (see below), whose sum is σ = 981537480. Its totient is φ = 123493248.

The previous prime is 404050837. The next prime is 404050861. The reversal of 404050842 is 248050404.

It can be written as a sum of positive squares in 4 ways, for example, as 245517561 + 158533281 = 15669^2 + 12591^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 363784 + ... + 364892.

Almost surely, 2^404050842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404050842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490768740).

404050842 is an abundant number, since it is smaller than the sum of its proper divisors (577486638).

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

404050842 is a wasteful number, since it uses less digits than its factorization.

404050842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 404050842 is about 20101.0159444741. The cubic root of 404050842 is about 739.2851887295.

The spelling of 404050842 in words is "four hundred four million, fifty thousand, eight hundred forty-two".