442732861 has 4 divisors (see below), whose sum is σ = 454698652. Its totient is φ = 430767072.

The previous prime is 442732847. The next prime is 442732867. The reversal of 442732861 is 168237244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 317516761 + 125216100 = 17819^2 + 11190^2 .

It is a cyclic number.

It is not a de Polignac number, because 442732861 - 2⁹ = 442732349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 11965753 = 442732861 / (4 + 4 + 2 + 7 + 3 + 2 + 8 + 6 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442732861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442732867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5982840 + ... + 5982913.

It is an arithmetic number, because the mean of its divisors is an integer number (113674663).

Almost surely, 2^442732861 is an apocalyptic number.

It is an amenable number.

442732861 is a deficient number, since it is larger than the sum of its proper divisors (11965791).

442732861 is a wasteful number, since it uses less digits than its factorization.

442732861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11965790.

The product of its digits is 64512, while the sum is 37.

The square root of 442732861 is about 21041.2181443946. The cubic root of 442732861 is about 762.1619311506.

The spelling of 442732861 in words is "four hundred forty-two million, seven hundred thirty-two thousand, eight hundred sixty-one".