4022220420 has 72 divisors (see below), whose sum is σ = 12530505624. Its totient is φ = 1043601408.

The previous prime is 4022220413. The next prime is 4022220431. The reversal of 4022220420 is 240222204.

4022220420 is a `hidden beast` number, since 4 + 0 + 22 + 220 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 268697664 + 3753522756 = 16392^2 + 61266^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4022220393 and 4022220402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295309 + ... + 308628.

Almost surely, 2^4022220420 is an apocalyptic number.

It is an amenable number.

4022220420 is an abundant number, since it is smaller than the sum of its proper divisors (8508285204).

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

4022220420 is a wasteful number, since it uses less digits than its factorization.

4022220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603989 (or 603984 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4022220420 is about 63420.9777597287. The cubic root of 4022220420 is about 1590.3350189983.

Adding to 4022220420 its reverse (240222204), we get a palindrome (4262442624).

The spelling of 4022220420 in words is "four billion, twenty-two million, two hundred twenty thousand, four hundred twenty".