404842831 has 4 divisors (see below), whose sum is σ = 404885664. Its totient is φ = 404800000.

The previous prime is 404842771. The next prime is 404842883. The reversal of 404842831 is 138248404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404842831 is a prime.

It is a super-2 number, since 2×404842831² = 327795435624189122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404842891) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 295 + ... + 28456.

It is an arithmetic number, because the mean of its divisors is an integer number (101221416).

Almost surely, 2^404842831 is an apocalyptic number.

404842831 is a deficient number, since it is larger than the sum of its proper divisors (42833).

404842831 is a wasteful number, since it uses less digits than its factorization.

404842831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42832.

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 404842831 is about 20120.7065233803. The cubic root of 404842831 is about 739.7679032283.

The spelling of 404842831 in words is "four hundred four million, eight hundred forty-two thousand, eight hundred thirty-one".