420616506 has 16 divisors (see below), whose sum is σ = 842046048. Its totient is φ = 140070000.

The previous prime is 420616501. The next prime is 420616523. The reversal of 420616506 is 605616024.

It is not an unprimeable number, because it can be changed into a prime (420616501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27045 + ... + 39656.

It is an arithmetic number, because the mean of its divisors is an integer number (52627878).

Almost surely, 2^420616506 is an apocalyptic number.

420616506 is an abundant number, since it is smaller than the sum of its proper divisors (421429542).

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

420616506 is a wasteful number, since it uses less digits than its factorization.

420616506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67757.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 420616506 is about 20508.9372225866. The cubic root of 420616506 is about 749.2534829741.

The spelling of 420616506 in words is "four hundred twenty million, six hundred sixteen thousand, five hundred six".