420916518 has 24 divisors (see below), whose sum is σ = 994894056. Its totient is φ = 127550400.

The previous prime is 420916501. The next prime is 420916547. The reversal of 420916518 is 815619024.

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 11 ways as a sum of consecutive naturals, for example, 1062723 + ... + 1063118.

It is an arithmetic number, because the mean of its divisors is an integer number (41453919).

Almost surely, 2^420916518 is an apocalyptic number.

420916518 is an abundant number, since it is smaller than the sum of its proper divisors (573977538).

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

420916518 is a wasteful number, since it uses less digits than its factorization.

420916518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125860 (or 2125857 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 420916518 is about 20516.2500959605. The cubic root of 420916518 is about 749.4315799737.

The spelling of 420916518 in words is "four hundred twenty million, nine hundred sixteen thousand, five hundred eighteen".