42220428 has 24 divisors (see below), whose sum is σ = 98678832. Its totient is φ = 14049984.

The previous prime is 42220393. The next prime is 42220463. The reversal of 42220428 is 82402224.

It is an interprime number because it is at equal distance from previous prime (42220393) and next prime (42220463).

It is a junction number, because it is equal to n+sod(n) for n = 42220398 and 42220407.

It is an unprimeable number.

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, 5526 + ... + 10722.

It is an arithmetic number, because the mean of its divisors is an integer number (4111618).

Almost surely, 2^42220428 is an apocalyptic number.

It is an amenable number.

42220428 is an abundant number, since it is smaller than the sum of its proper divisors (56458404).

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

42220428 is a wasteful number, since it uses less digits than its factorization.

42220428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881 (or 5879 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 42220428 is about 6497.7248325856. The cubic root of 42220428 is about 348.2097097744.

The spelling of 42220428 in words is "forty-two million, two hundred twenty thousand, four hundred twenty-eight".