420430450 has 48 divisors (see below), whose sum is σ = 869247936. Its totient is φ = 149988800.

The previous prime is 420430421. The next prime is 420430453. The reversal of 420430450 is 54034024.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (420430453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21939 + ... + 36361.

It is an arithmetic number, because the mean of its divisors is an integer number (18109332).

Almost surely, 2^420430450 is an apocalyptic number.

420430450 is an abundant number, since it is smaller than the sum of its proper divisors (448817486).

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

420430450 is a wasteful number, since it uses less digits than its factorization.

420430450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14499 (or 14494 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 420430450 is about 20504.4007471567. The cubic root of 420430450 is about 749.1429914585.

Adding to 420430450 its reverse (54034024), we get a palindrome (474464474).

The spelling of 420430450 in words is "four hundred twenty million, four hundred thirty thousand, four hundred fifty".