427949881 has 8 divisors (see below), whose sum is σ = 440495240. Its totient is φ = 415456128.

The previous prime is 427949867. The next prime is 427949887. The reversal of 427949881 is 188949724.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 253287225 + 174662656 = 15915^2 + 13216^2 .

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

It is not a de Polignac number, because 427949881 - 2⁵ = 427949849 is a prime.

It is a super-2 number, since 2×427949881² = 366282201295828322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427949887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4255 + ... + 29563.

It is an arithmetic number, because the mean of its divisors is an integer number (55061905).

Almost surely, 2^427949881 is an apocalyptic number.

It is an amenable number.

427949881 is a deficient number, since it is larger than the sum of its proper divisors (12545359).

427949881 is a wasteful number, since it uses less digits than its factorization.

427949881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25803.

The product of its digits is 1161216, while the sum is 52.

The square root of 427949881 is about 20686.9495334619. The cubic root of 427949881 is about 753.5827870772.

The spelling of 427949881 in words is "four hundred twenty-seven million, nine hundred forty-nine thousand, eight hundred eighty-one".