308427428 has 12 divisors (see below), whose sum is σ = 540341760. Its totient is φ = 154044072.

The previous prime is 308427403. The next prime is 308427451. The reversal of 308427428 is 824724803.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 308427391 and 308427400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38276 + ... + 45627.

It is an arithmetic number, because the mean of its divisors is an integer number (45028480).

Almost surely, 2^308427428 is an apocalyptic number.

It is an amenable number.

308427428 is a deficient number, since it is larger than the sum of its proper divisors (231914332).

308427428 is a wasteful number, since it uses less digits than its factorization.

308427428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84826 (or 84824 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 308427428 is about 17562.1020381958. The cubic root of 308427428 is about 675.6435950244.

The spelling of 308427428 in words is "three hundred eight million, four hundred twenty-seven thousand, four hundred twenty-eight".