308893680 has 180 divisors, whose sum is σ = 1085769048. Its totient is φ = 78693120.

The previous prime is 308893679. The next prime is 308893693. The reversal of 308893680 is 86398803.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 380475 + ... + 381285.

Almost surely, 2^308893680 is an apocalyptic number.

308893680 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 308893680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542884524).

308893680 is an abundant number, since it is smaller than the sum of its proper divisors (776875368).

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

308893680 is a wasteful number, since it uses less digits than its factorization.

308893680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 308893680 is about 17575.3714043260. The cubic root of 308893680 is about 675.9838820661.

The spelling of 308893680 in words is "three hundred eight million, eight hundred ninety-three thousand, six hundred eighty".