308142438 has 16 divisors (see below), whose sum is σ = 632941680. Its totient is φ = 99938016.

The previous prime is 308142433. The next prime is 308142451. The reversal of 308142438 is 834241803.

It is a junction number, because it is equal to n+sod(n) for n = 308142399 and 308142408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308142433) 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, 693793 + ... + 694236.

It is an arithmetic number, because the mean of its divisors is an integer number (39558855).

Almost surely, 2^308142438 is an apocalyptic number.

308142438 is an abundant number, since it is smaller than the sum of its proper divisors (324799242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

308142438 is a wasteful number, since it uses less digits than its factorization.

308142438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388071.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 308142438 is about 17553.9863848643. The cubic root of 308142438 is about 675.4354304367.

The spelling of 308142438 in words is "three hundred eight million, one hundred forty-two thousand, four hundred thirty-eight".