405325020 has 24 divisors (see below), whose sum is σ = 1134910224. Its totient is φ = 108086656.

The previous prime is 405325007. The next prime is 405325087. The reversal of 405325020 is 20523504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3377649 + ... + 3377768.

It is an arithmetic number, because the mean of its divisors is an integer number (47287926).

Almost surely, 2^405325020 is an apocalyptic number.

It is an amenable number.

405325020 is an abundant number, since it is smaller than the sum of its proper divisors (729585204).

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

405325020 is a wasteful number, since it uses less digits than its factorization.

405325020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755429 (or 6755427 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 405325020 is about 20132.6853648489. The cubic root of 405325020 is about 740.0614874644.

Adding to 405325020 its reverse (20523504), we get a palindrome (425848524).

The spelling of 405325020 in words is "four hundred five million, three hundred twenty-five thousand, twenty".