245306440 has 16 divisors (see below), whose sum is σ = 551939580. Its totient is φ = 98122560.

The previous prime is 245306423. The next prime is 245306449. The reversal of 245306440 is 44603542.

It can be written as a sum of positive squares in 2 ways, for example, as 220166244 + 25140196 = 14838^2 + 5014^2 .

It is a junction number, because it is equal to n+sod(n) for n = 245306399 and 245306408.

It is not an unprimeable number, because it can be changed into a prime (245306449) 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 3 ways as a sum of consecutive naturals, for example, 3066291 + ... + 3066370.

Almost surely, 2^245306440 is an apocalyptic number.

245306440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245306440 is an abundant number, since it is smaller than the sum of its proper divisors (306633140).

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

245306440 is a wasteful number, since it uses less digits than its factorization.

245306440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132672 (or 6132668 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 245306440 is about 15662.2616502215. The cubic root of 245306440 is about 625.9932494925.

Adding to 245306440 its reverse (44603542), we get a palindrome (289909982).

The spelling of 245306440 in words is "two hundred forty-five million, three hundred six thousand, four hundred forty".