306889020 has 96 divisors (see below), whose sum is σ = 987739200. Its totient is φ = 79011072.

The previous prime is 306889003. The next prime is 306889043. The reversal of 306889020 is 20988603.

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

It is a congruent number.

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, 5862 + ... + 25458.

It is an arithmetic number, because the mean of its divisors is an integer number (10288950).

Almost surely, 2^306889020 is an apocalyptic number.

306889020 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 306889020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493869600).

306889020 is an abundant number, since it is smaller than the sum of its proper divisors (680850180).

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

306889020 is a wasteful number, since it uses less digits than its factorization.

306889020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19644 (or 19636 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 306889020 is about 17518.2482000912. The cubic root of 306889020 is about 674.5183724792.

The spelling of 306889020 in words is "three hundred six million, eight hundred eighty-nine thousand, twenty".