420406550 has 12 divisors (see below), whose sum is σ = 781956276. Its totient is φ = 168162600.

The previous prime is 420406523. The next prime is 420406561. The reversal of 420406550 is 55604024.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4204016 + ... + 4204115.

It is an arithmetic number, because the mean of its divisors is an integer number (65163023).

Almost surely, 2^420406550 is an apocalyptic number.

420406550 is a deficient number, since it is larger than the sum of its proper divisors (361549726).

420406550 is a wasteful number, since it uses less digits than its factorization.

420406550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408143 (or 8408138 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 420406550 is about 20503.8179371550. The cubic root of 420406550 is about 749.1287958036.

The spelling of 420406550 in words is "four hundred twenty million, four hundred six thousand, five hundred fifty".