395742290 has 8 divisors (see below), whose sum is σ = 712336140. Its totient is φ = 158296912.

The previous prime is 395742289. The next prime is 395742307. The reversal of 395742290 is 92247593.

It can be written as a sum of positive squares in 2 ways, for example, as 354230041 + 41512249 = 18821^2 + 6443^2 .

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

It is a super-2 number, since 2×395742290² = 313223920188888200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19787105 + ... + 19787124.

Almost surely, 2^395742290 is an apocalyptic number.

395742290 is a deficient number, since it is larger than the sum of its proper divisors (316593850).

395742290 is a wasteful number, since it uses less digits than its factorization.

395742290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39574236.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 395742290 is about 19893.2724809168. The cubic root of 395742290 is about 734.1827125715.

The spelling of 395742290 in words is "three hundred ninety-five million, seven hundred forty-two thousand, two hundred ninety".