308148840 has 128 divisors (see below), whose sum is σ = 1081296000. Its totient is φ = 77842944.

The previous prime is 308148833. The next prime is 308148857. The reversal of 308148840 is 48841803.

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 = 308148795 and 308148804.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13012 + ... + 28028.

It is an arithmetic number, because the mean of its divisors is an integer number (8447625).

Almost surely, 2^308148840 is an apocalyptic number.

308148840 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 308148840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540648000).

308148840 is an abundant number, since it is smaller than the sum of its proper divisors (773147160).

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

308148840 is a wasteful number, since it uses less digits than its factorization.

308148840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15056 (or 15046 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 308148840 is about 17554.1687356593. The cubic root of 308148840 is about 675.4401080437.

The spelling of 308148840 in words is "three hundred eight million, one hundred forty-eight thousand, eight hundred forty".