420022240 has 48 divisors (see below), whose sum is σ = 1082516400. Its totient is φ = 152734720.

The previous prime is 420022199. The next prime is 420022241. The reversal of 420022240 is 42220024.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420022241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 117565 + ... + 121084.

It is an arithmetic number, because the mean of its divisors is an integer number (22552425).

Almost surely, 2^420022240 is an apocalyptic number.

420022240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420022240 is an abundant number, since it is smaller than the sum of its proper divisors (662494160).

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

420022240 is a wasteful number, since it uses less digits than its factorization.

420022240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238675 (or 238667 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 420022240 is about 20494.4441251770. Note that the first 3 decimals coincide. The cubic root of 420022240 is about 748.9004569427.

Adding to 420022240 its reverse (42220024), we get a palindrome (462242264).

The spelling of 420022240 in words is "four hundred twenty million, twenty-two thousand, two hundred forty".