404136428 has 6 divisors (see below), whose sum is σ = 707238756. Its totient is φ = 202068212.

The previous prime is 404136413. The next prime is 404136457. The reversal of 404136428 is 824631404.

It is a junction number, because it is equal to n+sod(n) for n = 404136394 and 404136403.

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 as a sum of consecutive naturals, namely, 50517050 + ... + 50517057.

It is an arithmetic number, because the mean of its divisors is an integer number (117873126).

Almost surely, 2^404136428 is an apocalyptic number.

It is an amenable number.

404136428 is a deficient number, since it is larger than the sum of its proper divisors (303102328).

404136428 is a wasteful number, since it uses less digits than its factorization.

404136428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101034111 (or 101034109 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 404136428 is about 20103.1447291214. The cubic root of 404136428 is about 739.3373834772.

The spelling of 404136428 in words is "four hundred four million, one hundred thirty-six thousand, four hundred twenty-eight".