308828040 has 64 divisors (see below), whose sum is σ = 930951360. Its totient is φ = 81957120.

The previous prime is 308828029. The next prime is 308828041. The reversal of 308828040 is 40828803.

It is a junction number, because it is equal to n+sod(n) for n = 308827992 and 308828010.

It is not an unprimeable number, because it can be changed into a prime (308828041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19222 + ... + 31418.

It is an arithmetic number, because the mean of its divisors is an integer number (14546115).

Almost surely, 2^308828040 is an apocalyptic number.

308828040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308828040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465475680).

308828040 is an abundant number, since it is smaller than the sum of its proper divisors (622123320).

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

308828040 is a wasteful number, since it uses less digits than its factorization.

308828040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12422 (or 12418 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 308828040 is about 17573.5039192530. The cubic root of 308828040 is about 675.9359964146.

The spelling of 308828040 in words is "three hundred eight million, eight hundred twenty-eight thousand, forty".