442860999 has 48 divisors (see below), whose sum is σ = 733970688. Its totient is φ = 232501248.

The previous prime is 442860991. The next prime is 442861007. The reversal of 442860999 is 999068244.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (442860991) and next prime (442861007).

It is not a de Polignac number, because 442860999 - 2³ = 442860991 is a prime.

It is a super-2 number, since 2×442860999² = 392251728870556002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442860991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260119 + ... + 261815.

It is an arithmetic number, because the mean of its divisors is an integer number (15291056).

Almost surely, 2^442860999 is an apocalyptic number.

442860999 is a deficient number, since it is larger than the sum of its proper divisors (291109689).

442860999 is a wasteful number, since it uses less digits than its factorization.

442860999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784 (or 1767 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 442860999 is about 21044.2628523786. The cubic root of 442860999 is about 762.2354536542.

The spelling of 442860999 in words is "four hundred forty-two million, eight hundred sixty thousand, nine hundred ninety-nine".