307280 has 40 divisors (see below), whose sum is σ = 749952. Its totient is φ = 116864.

The previous prime is 307277. The next prime is 307283. The reversal of 307280 is 82703.

It is an interprime number because it is at equal distance from previous prime (307277) and next prime (307283).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757 + ... + 1923.

2³⁰⁷²⁸⁰ 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 307280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374976).

307280 is an abundant number, since it is smaller than the sum of its proper divisors (442672).

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

307280 is a wasteful number, since it uses less digits than its factorization.

307280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 307280 is about 554.3284225078. The cubic root of 307280 is about 67.4804698871.

Adding to 307280 its reverse (82703), we get a palindrome (389983).

The spelling of 307280 in words is "three hundred seven thousand, two hundred eighty".