245391648 has 24 divisors (see below), whose sum is σ = 644153328. Its totient is φ = 81797184.

The previous prime is 245391647. The next prime is 245391661. The reversal of 245391648 is 846193542.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (245391647) 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, 1277986 + ... + 1278177.

It is an arithmetic number, because the mean of its divisors is an integer number (26839722).

Almost surely, 2^245391648 is an apocalyptic number.

It is an amenable number.

245391648 is an abundant number, since it is smaller than the sum of its proper divisors (398761680).

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

245391648 is a wasteful number, since it uses less digits than its factorization.

245391648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556176 (or 2556168 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 245391648 is about 15664.9815831363. The cubic root of 245391648 is about 626.0657213745.

The spelling of 245391648 in words is "two hundred forty-five million, three hundred ninety-one thousand, six hundred forty-eight".