442384784 has 20 divisors (see below), whose sum is σ = 864987420. Its totient is φ = 219162240.

The previous prime is 442384781. The next prime is 442384807. The reversal of 442384784 is 487483244.

It can be written as a sum of positive squares in 2 ways, for example, as 276490384 + 165894400 = 16628^2 + 12880^2 .

It is a super-2 number, since 2×442384784² = 391408594229453312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442384781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125087 + ... + 128574.

It is an arithmetic number, because the mean of its divisors is an integer number (43249371).

Almost surely, 2^442384784 is an apocalyptic number.

It is an amenable number.

442384784 is a deficient number, since it is larger than the sum of its proper divisors (422602636).

442384784 is a wasteful number, since it uses less digits than its factorization.

442384784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253778 (or 253772 counting only the distinct ones).

The product of its digits is 688128, while the sum is 44.

The square root of 442384784 is about 21032.9452050824. The cubic root of 442384784 is about 761.9621413026.

The spelling of 442384784 in words is "four hundred forty-two million, three hundred eighty-four thousand, seven hundred eighty-four".