420420550 has 36 divisors (see below), whose sum is σ = 859546548. Its totient is φ = 152878000.

The previous prime is 420420487. The next prime is 420420551. The reversal of 420420550 is 55024024.

420420550 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×420420550³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420420551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28696 + ... + 40795.

It is an arithmetic number, because the mean of its divisors is an integer number (23876293).

Almost surely, 2^420420550 is an apocalyptic number.

420420550 is an abundant number, since it is smaller than the sum of its proper divisors (439125998).

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

420420550 is a wasteful number, since it uses less digits than its factorization.

420420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69525 (or 69509 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 420420550 is about 20504.1593341449. The cubic root of 420420550 is about 749.1371113153.

Adding to 420420550 its reverse (55024024), we get a palindrome (475444574).

The spelling of 420420550 in words is "four hundred twenty million, four hundred twenty thousand, five hundred fifty".