245543720 has 16 divisors (see below), whose sum is σ = 552473460. Its totient is φ = 98217472.

The previous prime is 245543719. The next prime is 245543737. The reversal of 245543720 is 27345542.

It can be written as a sum of positive squares in 2 ways, for example, as 242674084 + 2869636 = 15578^2 + 1694^2 .

It is an unprimeable number.

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, 3069257 + ... + 3069336.

Almost surely, 2^245543720 is an apocalyptic number.

245543720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245543720 is an abundant number, since it is smaller than the sum of its proper divisors (306929740).

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

245543720 is a wasteful number, since it uses less digits than its factorization.

245543720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138604 (or 6138600 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 245543720 is about 15669.8347151462. The cubic root of 245543720 is about 626.1950213554.

The spelling of 245543720 in words is "two hundred forty-five million, five hundred forty-three thousand, seven hundred twenty".