245785540 has 96 divisors (see below), whose sum is σ = 693068544. Its totient is φ = 70709760.

The previous prime is 245785481. The next prime is 245785543. The reversal of 245785540 is 45587542.

245785540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 245785493 and 245785502.

It is not an unprimeable number, because it can be changed into a prime (245785543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13882 + ... + 26158.

It is an arithmetic number, because the mean of its divisors is an integer number (7219464).

Almost surely, 2^245785540 is an apocalyptic number.

245785540 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 245785540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346534272).

245785540 is an abundant number, since it is smaller than the sum of its proper divisors (447283004).

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

245785540 is a wasteful number, since it uses less digits than its factorization.

245785540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12317 (or 12315 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 40.

The square root of 245785540 is about 15677.5489155671. The cubic root of 245785540 is about 626.4005201252.

The spelling of 245785540 in words is "two hundred forty-five million, seven hundred eighty-five thousand, five hundred forty".