404402425 has 12 divisors (see below), whose sum is σ = 573096256. Its totient is φ = 277304400.

The previous prime is 404402387. The next prime is 404402437. The reversal of 404402425 is 524204404.

It is a happy number.

It is not a de Polignac number, because 404402425 - 2¹¹ = 404400377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404402425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1155261 + ... + 1155610.

Almost surely, 2^404402425 is an apocalyptic number.

It is an amenable number.

404402425 is a deficient number, since it is larger than the sum of its proper divisors (168693831).

404402425 is a wasteful number, since it uses less digits than its factorization.

404402425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310888 (or 2310883 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 404402425 is about 20109.7594465971. The cubic root of 404402425 is about 739.4995551115.

Adding to 404402425 its reverse (524204404), we get a palindrome (928606829).

The spelling of 404402425 in words is "four hundred four million, four hundred two thousand, four hundred twenty-five".