442003549 has 16 divisors (see below), whose sum is σ = 492298240. Its totient is φ = 394087680.

The previous prime is 442003501. The next prime is 442003559. The reversal of 442003549 is 945300244.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 442003549 - 2¹⁷ = 441872477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

442003549 is a modest number, since divided by 3549 gives 442 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 442003549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442003559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406084 + ... + 407170.

It is an arithmetic number, because the mean of its divisors is an integer number (30768640).

Almost surely, 2^442003549 is an apocalyptic number.

It is an amenable number.

442003549 is a deficient number, since it is larger than the sum of its proper divisors (50294691).

442003549 is a wasteful number, since it uses less digits than its factorization.

442003549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 442003549 is about 21023.8804458168. The cubic root of 442003549 is about 761.7431990817.

The spelling of 442003549 in words is "four hundred forty-two million, three thousand, five hundred forty-nine".