442140442 has 8 divisors (see below), whose sum is σ = 663385716. Its totient is φ = 221011872.

The previous prime is 442140407. The next prime is 442140463. The reversal of 442140442 is 244041244.

It can be written as a sum of positive squares in 2 ways, for example, as 368678401 + 73462041 = 19201^2 + 8571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18993 + ... + 35284.

Almost surely, 2^442140442 is an apocalyptic number.

442140442 is a deficient number, since it is larger than the sum of its proper divisors (221245274).

442140442 is a wasteful number, since it uses less digits than its factorization.

442140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58352.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 442140442 is about 21027.1358487075. The cubic root of 442140442 is about 761.8218308397.

Adding to 442140442 its reverse (244041244), we get a palindrome (686181686).

The spelling of 442140442 in words is "four hundred forty-two million, one hundred forty thousand, four hundred forty-two".