307220000 has 60 divisors (see below), whose sum is σ = 755856486. Its totient is φ = 122880000.

The previous prime is 307219999. The next prime is 307220029. The reversal of 307220000 is 22703.

It can be written as a sum of positive squares in 5 ways, for example, as 18627856 + 288592144 = 4316^2 + 16988^2 .

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 9 ways as a sum of consecutive naturals, for example, 12320 + ... + 27680.

Almost surely, 2^307220000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 307220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377928243).

307220000 is an abundant number, since it is smaller than the sum of its proper divisors (448636486).

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

307220000 is an equidigital number, since it uses as much as digits as its factorization.

307220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15391 (or 15368 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 307220000 is about 17527.6923752101. The cubic root of 307220000 is about 674.7607748519.

Adding to 307220000 its reverse (22703), we get a palindrome (307242703).

The spelling of 307220000 in words is "three hundred seven million, two hundred twenty thousand".