395740685 has 8 divisors (see below), whose sum is σ = 475005336. Its totient is φ = 316514880.

The previous prime is 395740673. The next prime is 395740687. The reversal of 395740685 is 586047593.

It can be written as a sum of positive squares in 4 ways, for example, as 32228329 + 363512356 = 5677^2 + 19066^2 .

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

It is not a de Polignac number, because 395740685 - 2⁴ = 395740669 is a prime.

It is a super-2 number, since 2×395740685² = 313221379528538450, 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 (395740687) 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, 22307 + ... + 35903.

It is an arithmetic number, because the mean of its divisors is an integer number (59375667).

Almost surely, 2^395740685 is an apocalyptic number.

It is an amenable number.

395740685 is a deficient number, since it is larger than the sum of its proper divisors (79264651).

395740685 is a wasteful number, since it uses less digits than its factorization.

395740685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19423.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 395740685 is about 19893.2321406050. The cubic root of 395740685 is about 734.1817200360.

The spelling of 395740685 in words is "three hundred ninety-five million, seven hundred forty thousand, six hundred eighty-five".