245213440 has 144 divisors (see below), whose sum is σ = 635765760. Its totient is φ = 90275840.

The previous prime is 245213431. The next prime is 245213459. The reversal of 245213440 is 44312542.

It is a happy number.

245213440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1283745 + ... + 1283935.

It is an arithmetic number, because the mean of its divisors is an integer number (4415040).

Almost surely, 2^245213440 is an apocalyptic number.

245213440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317882880).

245213440 is an abundant number, since it is smaller than the sum of its proper divisors (390552320).

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

245213440 is a wasteful number, since it uses less digits than its factorization.

245213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 245213440 is about 15659.2924488944. The cubic root of 245213440 is about 625.9141311310.

Adding to 245213440 its reverse (44312542), we get a palindrome (289525982).

The spelling of 245213440 in words is "two hundred forty-five million, two hundred thirteen thousand, four hundred forty".