253826865 has 56 divisors (see below), whose sum is σ = 462732480. Its totient is φ = 133583904.

The previous prime is 253826857. The next prime is 253826891. The reversal of 253826865 is 568628352.

It is not a de Polignac number, because 253826865 - 2³ = 253826857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253826865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 302116 + ... + 302954.

It is an arithmetic number, because the mean of its divisors is an integer number (8263080).

Almost surely, 2^253826865 is an apocalyptic number.

It is an amenable number.

253826865 is a deficient number, since it is larger than the sum of its proper divisors (208905615).

253826865 is an frugal number, since it uses more digits than its factorization.

253826865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 930 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 253826865 is about 15931.9447965401. The cubic root of 253826865 is about 633.1586269421.

It can be divided in two parts, 2538 and 26865, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 253826865 in words is "two hundred fifty-three million, eight hundred twenty-six thousand, eight hundred sixty-five".