42220420 has 24 divisors (see below), whose sum is σ = 96723648. Its totient is φ = 15352800.

The previous prime is 42220393. The next prime is 42220463. The reversal of 42220420 is 2402224.

It is a junction number, because it is equal to n+sod(n) for n = 42220394 and 42220403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95736 + ... + 96175.

It is an arithmetic number, because the mean of its divisors is an integer number (4030152).

Almost surely, 2^42220420 is an apocalyptic number.

It is an amenable number.

42220420 is an abundant number, since it is smaller than the sum of its proper divisors (54503228).

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

42220420 is a wasteful number, since it uses less digits than its factorization.

42220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191931 (or 191929 counting only the distinct ones).

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

The square root of 42220420 is about 6497.7242169855. The cubic root of 42220420 is about 348.2096877812.

Adding to 42220420 its reverse (2402224), we get a palindrome (44622644).

It can be divided in two parts, 422204 and 20, that added together give a palindrome (422224).

The spelling of 42220420 in words is "forty-two million, two hundred twenty thousand, four hundred twenty".