395878813 has 32 divisors (see below), whose sum is σ = 488816640. Its totient is φ = 315912960.

The previous prime is 395878787. The next prime is 395878817. The reversal of 395878813 is 318878593.

It is not a de Polignac number, because 395878813 - 2¹⁷ = 395747741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395878817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237220 + ... + 238882.

It is an arithmetic number, because the mean of its divisors is an integer number (15275520).

Almost surely, 2^395878813 is an apocalyptic number.

It is an amenable number.

395878813 is a deficient number, since it is larger than the sum of its proper divisors (92937827).

395878813 is a wasteful number, since it uses less digits than its factorization.

395878813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777.

The product of its digits is 1451520, while the sum is 52.

The square root of 395878813 is about 19896.7035711949. The cubic root of 395878813 is about 734.2671288740.

It can be divided in two parts, 39587 and 8813, that added together give a square (48400 = 220²).

The spelling of 395878813 in words is "three hundred ninety-five million, eight hundred seventy-eight thousand, eight hundred thirteen".