308147840 has 384 divisors, whose sum is σ = 1021403520. Its totient is φ = 86261760.

The previous prime is 308147779. The next prime is 308147857. The reversal of 308147840 is 48741803.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 308147840.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8328302 + ... + 8328338.

It is an arithmetic number, because the mean of its divisors is an integer number (2659905).

Almost surely, 2^308147840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308147840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510701760).

308147840 is an abundant number, since it is smaller than the sum of its proper divisors (713255680).

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

308147840 is a wasteful number, since it uses less digits than its factorization.

308147840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 308147840 is about 17554.1402523735. The cubic root of 308147840 is about 675.4393774002.

The spelling of 308147840 in words is "three hundred eight million, one hundred forty-seven thousand, eight hundred forty".