394130258 has 4 divisors (see below), whose sum is σ = 591195390. Its totient is φ = 197065128.

The previous prime is 394130257. The next prime is 394130263. The reversal of 394130258 is 852031493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 367987489 + 26142769 = 19183^2 + 5113^2 .

It is a super-2 number, since 2×394130258² = 310677320542293128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394130257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98532563 + ... + 98532566.

Almost surely, 2^394130258 is an apocalyptic number.

394130258 is a deficient number, since it is larger than the sum of its proper divisors (197065132).

394130258 is a wasteful number, since it uses less digits than its factorization.

394130258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197065131.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 394130258 is about 19852.7141217517. The cubic root of 394130258 is about 733.1844731364.

The spelling of 394130258 in words is "three hundred ninety-four million, one hundred thirty thousand, two hundred fifty-eight".