245719940 has 12 divisors (see below), whose sum is σ = 516011916. Its totient is φ = 98287968.

The previous prime is 245719939. The next prime is 245719979. The reversal of 245719940 is 49917542.

It can be written as a sum of positive squares in 2 ways, for example, as 39337984 + 206381956 = 6272^2 + 14366^2 .

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, 6142979 + ... + 6143018.

It is an arithmetic number, because the mean of its divisors is an integer number (43000993).

Almost surely, 2^245719940 is an apocalyptic number.

245719940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245719940 is an abundant number, since it is smaller than the sum of its proper divisors (270291976).

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

245719940 is a wasteful number, since it uses less digits than its factorization.

245719940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12286006 (or 12286004 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 245719940 is about 15675.4566121692. The cubic root of 245719940 is about 626.3447865367.

The spelling of 245719940 in words is "two hundred forty-five million, seven hundred nineteen thousand, nine hundred forty".