308340381 has 4 divisors (see below), whose sum is σ = 411120512. Its totient is φ = 205560252.

The previous prime is 308340367. The next prime is 308340391. The reversal of 308340381 is 183043803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 308340381 - 2⁵ = 308340349 is a prime.

It is a super-2 number, since 2×308340381² = 190147581110450322, 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 (308340301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51390061 + ... + 51390066.

It is an arithmetic number, because the mean of its divisors is an integer number (102780128).

Almost surely, 2^308340381 is an apocalyptic number.

It is an amenable number.

308340381 is a deficient number, since it is larger than the sum of its proper divisors (102780131).

308340381 is a wasteful number, since it uses less digits than its factorization.

308340381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102780130.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 308340381 is about 17559.6236007495. The cubic root of 308340381 is about 675.5800270919.

The spelling of 308340381 in words is "three hundred eight million, three hundred forty thousand, three hundred eighty-one".