305280000 has 330 divisors, whose sum is σ = 1122292314. Its totient is φ = 79872000.

The previous prime is 305279981. The next prime is 305280023. The reversal of 305280000 is 82503.

305280000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 86713344 + 218566656 = 9312^2 + 14784^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5759974 + ... + 5760026.

Almost surely, 2^305280000 is an apocalyptic number.

305280000 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 305280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561146157).

305280000 is an abundant number, since it is smaller than the sum of its proper divisors (817012314).

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

305280000 is an equidigital number, since it uses as much as digits as its factorization.

305280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 305280000 is about 17472.2637342732. The cubic root of 305280000 is about 673.3374723357.

The spelling of 305280000 in words is "three hundred five million, two hundred eighty thousand".