308432880 has 160 divisors (see below), whose sum is σ = 1214208000. Its totient is φ = 70495488.

The previous prime is 308432867. The next prime is 308432881. The reversal of 308432880 is 88234803.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308432881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4921 + ... + 25319.

It is an arithmetic number, because the mean of its divisors is an integer number (7588800).

Almost surely, 2^308432880 is an apocalyptic number.

308432880 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 308432880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607104000).

308432880 is an abundant number, since it is smaller than the sum of its proper divisors (905775120).

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

308432880 is a wasteful number, since it uses less digits than its factorization.

308432880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428 (or 20416 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 308432880 is about 17562.2572581089. The cubic root of 308432880 is about 675.6475760659.

The spelling of 308432880 in words is "three hundred eight million, four hundred thirty-two thousand, eight hundred eighty".