405311020 has 12 divisors (see below), whose sum is σ = 851153184. Its totient is φ = 162124400.

The previous prime is 405311009. The next prime is 405311041. The reversal of 405311020 is 20113504.

It is a junction number, because it is equal to n+sod(n) for n = 405310985 and 405311003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10132756 + ... + 10132795.

It is an arithmetic number, because the mean of its divisors is an integer number (70929432).

Almost surely, 2^405311020 is an apocalyptic number.

It is an amenable number.

405311020 is an abundant number, since it is smaller than the sum of its proper divisors (445842164).

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

405311020 is a wasteful number, since it uses less digits than its factorization.

405311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20265560 (or 20265558 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 405311020 is about 20132.3376685372. The cubic root of 405311020 is about 740.0529667468.

Adding to 405311020 its reverse (20113504), we get a palindrome (425424524).

The spelling of 405311020 in words is "four hundred five million, three hundred eleven thousand, twenty".