306705540 has 24 divisors (see below), whose sum is σ = 858775680. Its totient is φ = 81788128.

The previous prime is 306705523. The next prime is 306705583. The reversal of 306705540 is 45507603.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 306705498 and 306705507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555820 + ... + 2555939.

It is an arithmetic number, because the mean of its divisors is an integer number (35782320).

Almost surely, 2^306705540 is an apocalyptic number.

306705540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

306705540 is an abundant number, since it is smaller than the sum of its proper divisors (552070140).

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

306705540 is a wasteful number, since it uses less digits than its factorization.

306705540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111771 (or 5111769 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 306705540 is about 17513.0105921284. The cubic root of 306705540 is about 674.3839207226.

The spelling of 306705540 in words is "three hundred six million, seven hundred five thousand, five hundred forty".