395949831 has 8 divisors (see below), whose sum is σ = 528037104. Its totient is φ = 263914560.

The previous prime is 395949821. The next prime is 395949871. The reversal of 395949831 is 138949593.

It is a happy number.

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

It is not a de Polignac number, because 395949831 - 2¹⁹ = 395425543 is a prime.

It is a super-2 number, since 2×395949831² = 313552537337857122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395949811) 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, 11211 + ... + 30291.

It is an arithmetic number, because the mean of its divisors is an integer number (66004638).

Almost surely, 2^395949831 is an apocalyptic number.

395949831 is a deficient number, since it is larger than the sum of its proper divisors (132087273).

395949831 is a wasteful number, since it uses less digits than its factorization.

395949831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26001.

The product of its digits is 1049760, while the sum is 51.

The square root of 395949831 is about 19898.4881586517. The cubic root of 395949831 is about 734.3110337791.

The spelling of 395949831 in words is "three hundred ninety-five million, nine hundred forty-nine thousand, eight hundred thirty-one".