307402240 has 40 divisors (see below), whose sum is σ = 737051040. Its totient is φ = 122959872.

The previous prime is 307402237. The next prime is 307402247. The reversal of 307402240 is 42204703.

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

It is a super-2 number, since 2×307402240² = 188992274314035200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307402247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57480 + ... + 62599.

It is an arithmetic number, because the mean of its divisors is an integer number (18426276).

Almost surely, 2^307402240 is an apocalyptic number.

It is an amenable number.

307402240 is an abundant number, since it is smaller than the sum of its proper divisors (429648800).

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

307402240 is an equidigital number, since it uses as much as digits as its factorization.

307402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120102 (or 120086 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 307402240 is about 17532.8902352122. The cubic root of 307402240 is about 674.8941690504.

Adding to 307402240 its reverse (42204703), we get a palindrome (349606943).

The spelling of 307402240 in words is "three hundred seven million, four hundred two thousand, two hundred forty".