308345146 has 4 divisors (see below), whose sum is σ = 462517722. Its totient is φ = 154172572.

The previous prime is 308345143. The next prime is 308345159. The reversal of 308345146 is 641543803.

It is a happy number.

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., 217238121 + 91107025 = 14739^2 + 9545^2 .

It is a super-2 number, since 2×308345146² = 190153458123522632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (308345143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77086285 + ... + 77086288.

Almost surely, 2^308345146 is an apocalyptic number.

308345146 is a deficient number, since it is larger than the sum of its proper divisors (154172576).

308345146 is a wasteful number, since it uses less digits than its factorization.

308345146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154172575.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 308345146 is about 17559.7592808102. The cubic root of 308345146 is about 675.5835071445.

Adding to 308345146 its reverse (641543803), we get a palindrome (949888949).

The spelling of 308345146 in words is "three hundred eight million, three hundred forty-five thousand, one hundred forty-six".