404042028 has 24 divisors (see below), whose sum is σ = 1015285488. Its totient is φ = 124320576.

The previous prime is 404042027. The next prime is 404042029. The reversal of 404042028 is 820240404.

It is an interprime number because it is at equal distance from previous prime (404042027) and next prime (404042029).

It is a junction number, because it is equal to n+sod(n) for n = 404041989 and 404042007.

It is not an unprimeable number, because it can be changed into a prime (404042021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294851 + ... + 1295162.

It is an arithmetic number, because the mean of its divisors is an integer number (42303562).

Almost surely, 2^404042028 is an apocalyptic number.

It is an amenable number.

404042028 is an abundant number, since it is smaller than the sum of its proper divisors (611243460).

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

404042028 is a wasteful number, since it uses less digits than its factorization.

404042028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590033 (or 2590031 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 404042028 is about 20100.7967006286. The cubic root of 404042028 is about 739.2798130801.

The spelling of 404042028 in words is "four hundred four million, forty-two thousand, twenty-eight".