405550020 has 24 divisors (see below), whose sum is σ = 1135540224. Its totient is φ = 108146656.

The previous prime is 405550001. The next prime is 405550039. The reversal of 405550020 is 20055504.

It is an interprime number because it is at equal distance from previous prime (405550001) and next prime (405550039).

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, 3379524 + ... + 3379643.

It is an arithmetic number, because the mean of its divisors is an integer number (47314176).

Almost surely, 2^405550020 is an apocalyptic number.

It is an amenable number.

405550020 is an abundant number, since it is smaller than the sum of its proper divisors (729990204).

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

405550020 is a wasteful number, since it uses less digits than its factorization.

405550020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759179 (or 6759177 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 405550020 is about 20138.2725177707. The cubic root of 405550020 is about 740.1984006615.

The spelling of 405550020 in words is "four hundred five million, five hundred fifty thousand, twenty".