4002242420 has 48 divisors (see below), whose sum is σ = 9567427968. Its totient is φ = 1392082560.

The previous prime is 4002242417. The next prime is 4002242423. The reversal of 4002242420 is 242422004.

It is an interprime number because it is at equal distance from previous prime (4002242417) and next prime (4002242423).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 4002242392 and 4002242401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002242423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390419 + ... + 400538.

It is an arithmetic number, because the mean of its divisors is an integer number (199321416).

Almost surely, 2^4002242420 is an apocalyptic number.

It is an amenable number.

4002242420 is an abundant number, since it is smaller than the sum of its proper divisors (5565185548).

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

4002242420 is a wasteful number, since it uses less digits than its factorization.

4002242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791000 (or 790998 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4002242420 is about 63263.2786061551. The cubic root of 4002242420 is about 1587.6976315427.

Adding to 4002242420 its reverse (242422004), we get a palindrome (4244664424).

The spelling of 4002242420 in words is "four billion, two million, two hundred forty-two thousand, four hundred twenty".