404224425 has 144 divisors (see below), whose sum is σ = 857945088. Its totient is φ = 186753600.

The previous prime is 404224397. The next prime is 404224439. The reversal of 404224425 is 524422404.

It is not a de Polignac number, because 404224425 - 2⁸ = 404224169 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1536844 + ... + 1537106.

It is an arithmetic number, because the mean of its divisors is an integer number (5957952).

Almost surely, 2^404224425 is an apocalyptic number.

404224425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404224425 is an abundant number, since it is smaller than the sum of its proper divisors (453720663).

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

404224425 is a wasteful number, since it uses less digits than its factorization.

404224425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 404224425 is about 20105.3332476734. Note that the first 3 decimals coincide. The cubic root of 404224425 is about 739.3910408939.

Adding to 404224425 its reverse (524422404), we get a palindrome (928646829).

The spelling of 404224425 in words is "four hundred four million, two hundred twenty-four thousand, four hundred twenty-five".