245778530 has 8 divisors (see below), whose sum is σ = 442401372. Its totient is φ = 98311408.

The previous prime is 245778523. The next prime is 245778539. The reversal of 245778530 is 35877542.

It can be written as a sum of positive squares in 2 ways, for example, as 245768329 + 10201 = 15677^2 + 101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245778539) 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, 12288917 + ... + 12288936.

Almost surely, 2^245778530 is an apocalyptic number.

245778530 is a deficient number, since it is larger than the sum of its proper divisors (196622842).

245778530 is a wasteful number, since it uses less digits than its factorization.

245778530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24577860.

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 245778530 is about 15677.3253458618. The cubic root of 245778530 is about 626.3945649208.

The spelling of 245778530 in words is "two hundred forty-five million, seven hundred seventy-eight thousand, five hundred thirty".