442743813 has 48 divisors (see below), whose sum is σ = 711075456. Its totient is φ = 274570560.

The previous prime is 442743797. The next prime is 442743817. The reversal of 442743813 is 318347244.

442743813 is a `hidden beast` number, since 4 + 4 + 274 + 381 + 3 = 666.

It is not a de Polignac number, because 442743813 - 2⁴ = 442743797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442743817) 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, 205723 + ... + 207863.

It is an arithmetic number, because the mean of its divisors is an integer number (14814072).

Almost surely, 2^442743813 is an apocalyptic number.

It is an amenable number.

442743813 is a deficient number, since it is larger than the sum of its proper divisors (268331643).

442743813 is a wasteful number, since it uses less digits than its factorization.

442743813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216 (or 2204 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 442743813 is about 21041.4783938772. The cubic root of 442743813 is about 762.1682156992.

It can be divided in two parts, 442743 and 813, that added together give a square (443556 = 666²).

The spelling of 442743813 in words is "four hundred forty-two million, seven hundred forty-three thousand, eight hundred thirteen".