420323650 has 12 divisors (see below), whose sum is σ = 781802082. Its totient is φ = 168129440.

The previous prime is 420323647. The next prime is 420323669. The reversal of 420323650 is 56323024.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 181899169 + 238424481 = 13487^2 + 15441^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4203187 + ... + 4203286.

Almost surely, 2^420323650 is an apocalyptic number.

420323650 is a deficient number, since it is larger than the sum of its proper divisors (361478432).

420323650 is a wasteful number, since it uses less digits than its factorization.

420323650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406485 (or 8406480 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 420323650 is about 20501.7962627668. The cubic root of 420323650 is about 749.0795523117.

Adding to 420323650 its reverse (56323024), we get a palindrome (476646674).

The spelling of 420323650 in words is "four hundred twenty million, three hundred twenty-three thousand, six hundred fifty".