307223640 has 96 divisors (see below), whose sum is σ = 1030723200. Its totient is φ = 79280640.

The previous prime is 307223599. The next prime is 307223641. The reversal of 307223640 is 46322703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307223641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2605 + ... + 24924.

It is an arithmetic number, because the mean of its divisors is an integer number (10736700).

Almost surely, 2^307223640 is an apocalyptic number.

307223640 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 307223640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515361600).

307223640 is an abundant number, since it is smaller than the sum of its proper divisors (723499560).

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

307223640 is a wasteful number, since it uses less digits than its factorization.

307223640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27577 (or 27570 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 307223640 is about 17527.7962105908. The cubic root of 307223640 is about 674.7634397386.

The spelling of 307223640 in words is "three hundred seven million, two hundred twenty-three thousand, six hundred forty".