405646325 has 12 divisors (see below), whose sum is σ = 574859040. Its totient is φ = 278157360.

The previous prime is 405646321. The next prime is 405646357. The reversal of 405646325 is 523646504.

It is a happy number.

It is not a de Polignac number, because 405646325 - 2² = 405646321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405646321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1158815 + ... + 1159164.

It is an arithmetic number, because the mean of its divisors is an integer number (47904920).

Almost surely, 2^405646325 is an apocalyptic number.

It is an amenable number.

405646325 is a deficient number, since it is larger than the sum of its proper divisors (169212715).

405646325 is a wasteful number, since it uses less digits than its factorization.

405646325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317996 (or 2317991 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 405646325 is about 20140.6634697072. The cubic root of 405646325 is about 740.2569870763.

The spelling of 405646325 in words is "four hundred five million, six hundred forty-six thousand, three hundred twenty-five".