305007240 has 64 divisors (see below), whose sum is σ = 916272000. Its totient is φ = 81224192.

The previous prime is 305007221. The next prime is 305007257. The reversal of 305007240 is 42700503.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124669 + ... + 127091.

It is an arithmetic number, because the mean of its divisors is an integer number (14316750).

Almost surely, 2^305007240 is an apocalyptic number.

305007240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305007240 is an abundant number, since it is smaller than the sum of its proper divisors (611264760).

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

305007240 is a wasteful number, since it uses less digits than its factorization.

305007240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 305007240 is about 17464.4564759399. The cubic root of 305007240 is about 673.1368758838.

Adding to 305007240 its reverse (42700503), we get a palindrome (347707743).

The spelling of 305007240 in words is "three hundred five million, seven thousand, two hundred forty".