308428839 has 12 divisors (see below), whose sum is σ = 446476576. Its totient is φ = 205172352.

The previous prime is 308428837. The next prime is 308428849. The reversal of 308428839 is 938824803.

It is not a de Polignac number, because 308428839 - 2¹ = 308428837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 308428794 and 308428803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308428831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32842 + ... + 41175.

Almost surely, 2^308428839 is an apocalyptic number.

308428839 is a deficient number, since it is larger than the sum of its proper divisors (138047737).

308428839 is a wasteful number, since it uses less digits than its factorization.

308428839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74486 (or 74483 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 308428839 is about 17562.1422098786. The cubic root of 308428839 is about 675.6446253388.

The spelling of 308428839 in words is "three hundred eight million, four hundred twenty-eight thousand, eight hundred thirty-nine".