442137730 has 16 divisors (see below), whose sum is σ = 796536504. Its totient is φ = 176702080.

The previous prime is 442137719. The next prime is 442137743. The reversal of 442137730 is 37731244.

It can be written as a sum of positive squares in 4 ways, for example, as 419963049 + 22174681 = 20493^2 + 4709^2 .

It is a junction number, because it is equal to n+sod(n) for n = 442137692 and 442137701.

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, 6601 + ... + 30460.

Almost surely, 2^442137730 is an apocalyptic number.

442137730 is a deficient number, since it is larger than the sum of its proper divisors (354398774).

442137730 is a wasteful number, since it uses less digits than its factorization.

442137730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38261.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 442137730 is about 21027.0713605105. The cubic root of 442137730 is about 761.8202732162.

Adding to 442137730 its reverse (37731244), we get a palindrome (479868974).

The spelling of 442137730 in words is "four hundred forty-two million, one hundred thirty-seven thousand, seven hundred thirty".