248735857 has 16 divisors (see below), whose sum is σ = 269875584. Its totient is φ = 228384000.

The previous prime is 248735843. The next prime is 248735863. The reversal of 248735857 is 758537842.

It is not a de Polignac number, because 248735857 - 2¹⁹ = 248211569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 248735857.

It is not an unprimeable number, because it can be changed into a prime (248735827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134932 + ... + 136762.

It is an arithmetic number, because the mean of its divisors is an integer number (16867224).

Almost surely, 2^248735857 is an apocalyptic number.

It is an amenable number.

248735857 is a deficient number, since it is larger than the sum of its proper divisors (21139727).

248735857 is a wasteful number, since it uses less digits than its factorization.

248735857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040.

The product of its digits is 1881600, while the sum is 49.

The square root of 248735857 is about 15771.3619259720. The cubic root of 248735857 is about 628.8969166066.

The spelling of 248735857 in words is "two hundred forty-eight million, seven hundred thirty-five thousand, eight hundred fifty-seven".