442814861 has 8 divisors (see below), whose sum is σ = 475286904. Its totient is φ = 411056640.

The previous prime is 442814857. The next prime is 442814863. The reversal of 442814861 is 168418244.

It can be written as a sum of positive squares in 4 ways, for example, as 73444900 + 369369961 = 8570^2 + 19219^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 442814861 - 2² = 442814857 is a prime.

It is a super-2 number, since 2×442814861² = 392170002244898642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442814863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177170 + ... + 179651.

It is an arithmetic number, because the mean of its divisors is an integer number (59410863).

Almost surely, 2^442814861 is an apocalyptic number.

It is an amenable number.

442814861 is a deficient number, since it is larger than the sum of its proper divisors (32472043).

442814861 is a wasteful number, since it uses less digits than its factorization.

442814861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356911.

The product of its digits is 49152, while the sum is 38.

The square root of 442814861 is about 21043.1666105651. The cubic root of 442814861 is about 762.2089824132.

The spelling of 442814861 in words is "four hundred forty-two million, eight hundred fourteen thousand, eight hundred sixty-one".