308341728 has 144 divisors (see below), whose sum is σ = 957640320. Its totient is φ = 97324416.

The previous prime is 308341697. The next prime is 308341739. The reversal of 308341728 is 827143803.

308341728 is a `hidden beast` number, since 308 + 341 + 7 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×308341728³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 308341692 and 308341701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146701 + ... + 148787.

It is an arithmetic number, because the mean of its divisors is an integer number (6650280).

Almost surely, 2^308341728 is an apocalyptic number.

308341728 is a gapful number since it is divisible by the number (38) 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 308341728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478820160).

308341728 is an abundant number, since it is smaller than the sum of its proper divisors (649298592).

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

308341728 is a wasteful number, since it uses less digits than its factorization.

308341728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 308341728 is about 17559.6619557439. The cubic root of 308341728 is about 675.5810108586.

The spelling of 308341728 in words is "three hundred eight million, three hundred forty-one thousand, seven hundred twenty-eight".