253768784 has 20 divisors (see below), whose sum is σ = 499739220. Its totient is φ = 124803840.

The previous prime is 253768771. The next prime is 253768789. The reversal of 253768784 is 487867352.

It can be written as a sum of positive squares in 2 ways, for example, as 9784384 + 243984400 = 3128^2 + 15620^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253768789) 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, 129029 + ... + 130980.

It is an arithmetic number, because the mean of its divisors is an integer number (24986961).

Almost surely, 2^253768784 is an apocalyptic number.

It is an amenable number.

253768784 is a deficient number, since it is larger than the sum of its proper divisors (245970436).

253768784 is a wasteful number, since it uses less digits than its factorization.

253768784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260078 (or 260072 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The square root of 253768784 is about 15930.1219078826. The cubic root of 253768784 is about 633.1103298591.

The spelling of 253768784 in words is "two hundred fifty-three million, seven hundred sixty-eight thousand, seven hundred eighty-four".