442423220 has 24 divisors (see below), whose sum is σ = 948858624. Its totient is φ = 173203616.

The previous prime is 442423211. The next prime is 442423229. The reversal of 442423220 is 22324244.

It is an interprime number because it is at equal distance from previous prime (442423211) and next prime (442423229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442423229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234392 + ... + 236271.

It is an arithmetic number, because the mean of its divisors is an integer number (39535776).

Almost surely, 2^442423220 is an apocalyptic number.

It is an amenable number.

442423220 is an abundant number, since it is smaller than the sum of its proper divisors (506435404).

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

442423220 is a wasteful number, since it uses less digits than its factorization.

442423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470719 (or 470717 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 442423220 is about 21033.8588946489. The cubic root of 442423220 is about 761.9842080115.

Adding to 442423220 its reverse (22324244), we get a palindrome (464747464).

The spelling of 442423220 in words is "four hundred forty-two million, four hundred twenty-three thousand, two hundred twenty".