245308857 has 8 divisors (see below), whose sum is σ = 333249984. Its totient is φ = 160453488.

The previous prime is 245308849. The next prime is 245308873. The reversal of 245308857 is 758803542.

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

It is not a de Polignac number, because 245308857 - 2³ = 245308849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245308057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771253 + ... + 771570.

It is an arithmetic number, because the mean of its divisors is an integer number (41656248).

Almost surely, 2^245308857 is an apocalyptic number.

It is an amenable number.

245308857 is a deficient number, since it is larger than the sum of its proper divisors (87941127).

245308857 is a wasteful number, since it uses less digits than its factorization.

245308857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542879.

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 245308857 is about 15662.3388100245. The cubic root of 245308857 is about 625.9953054526.

The spelling of 245308857 in words is "two hundred forty-five million, three hundred eight thousand, eight hundred fifty-seven".