42020220 has 48 divisors (see below), whose sum is σ = 128354688. Its totient is φ = 10186560.

The previous prime is 42020219. The next prime is 42020227. The reversal of 42020220 is 2202024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 42020196 and 42020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020227) 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, 31174 + ... + 32493.

It is an arithmetic number, because the mean of its divisors is an integer number (2674056).

Almost surely, 2^42020220 is an apocalyptic number.

It is an amenable number.

42020220 is an abundant number, since it is smaller than the sum of its proper divisors (86334468).

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

42020220 is a wasteful number, since it uses less digits than its factorization.

42020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63690 (or 63688 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 42020220 is about 6482.3005175632. The cubic root of 42020220 is about 347.6584374908.

Adding to 42020220 its reverse (2202024), we get a palindrome (44222244).

The spelling of 42020220 in words is "forty-two million, twenty thousand, two hundred twenty".