308288428 has 24 divisors (see below), whose sum is σ = 636468224. Its totient is φ = 127861200.

The previous prime is 308288423. The next prime is 308288429. The reversal of 308288428 is 824882803.

308288428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×308288428² = 190083509677422368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (308288423) 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, 176718 + ... + 178453.

Almost surely, 2^308288428 is an apocalyptic number.

It is an amenable number.

308288428 is an abundant number, since it is smaller than the sum of its proper divisors (328179796).

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

308288428 is a wasteful number, since it uses less digits than its factorization.

308288428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355213 (or 355211 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 43.

The square root of 308288428 is about 17558.1442071763. The cubic root of 308288428 is about 675.5420816018.

The spelling of 308288428 in words is "three hundred eight million, two hundred eighty-eight thousand, four hundred twenty-eight".