307869220 has 48 divisors (see below), whose sum is σ = 671554800. Its totient is φ = 118415360.

The previous prime is 307869197. The next prime is 307869229. The reversal of 307869220 is 22968703.

It can be written as a sum of positive squares in 8 ways, for example, as 147456 + 307721764 = 384^2 + 17542^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 307869220.

It is not an unprimeable number, because it can be changed into a prime (307869229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 162036 + ... + 163924.

It is an arithmetic number, because the mean of its divisors is an integer number (13990725).

Almost surely, 2^307869220 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 307869220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335777400).

307869220 is an abundant number, since it is smaller than the sum of its proper divisors (363685580).

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

307869220 is a wasteful number, since it uses less digits than its factorization.

307869220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 307869220 is about 17546.2024381346. The cubic root of 307869220 is about 675.2357439028.

The spelling of 307869220 in words is "three hundred seven million, eight hundred sixty-nine thousand, two hundred twenty".