245517240 has 128 divisors (see below), whose sum is σ = 780192000. Its totient is φ = 61636608.

The previous prime is 245517211. The next prime is 245517263. The reversal of 245517240 is 42715542.

245517240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 245517198 and 245517207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 585751 + ... + 586169.

It is an arithmetic number, because the mean of its divisors is an integer number (6095250).

Almost surely, 2^245517240 is an apocalyptic number.

245517240 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 245517240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390096000).

245517240 is an abundant number, since it is smaller than the sum of its proper divisors (534674760).

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

245517240 is a wasteful number, since it uses less digits than its factorization.

245517240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 245517240 is about 15668.9897568414. The cubic root of 245517240 is about 626.1725104420.

The spelling of 245517240 in words is "two hundred forty-five million, five hundred seventeen thousand, two hundred forty".