253788445 has 4 divisors (see below), whose sum is σ = 304546140. Its totient is φ = 203030752.

The previous prime is 253788443. The next prime is 253788467. The reversal of 253788445 is 544887352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143496441 + 110292004 = 11979^2 + 10502^2 .

It is a cyclic number.

It is not a de Polignac number, because 253788445 - 2¹ = 253788443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253788395 and 253788404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253788443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25378840 + ... + 25378849.

It is an arithmetic number, because the mean of its divisors is an integer number (76136535).

Almost surely, 2^253788445 is an apocalyptic number.

It is an amenable number.

253788445 is a deficient number, since it is larger than the sum of its proper divisors (50757695).

253788445 is an equidigital number, since it uses as much as digits as its factorization.

253788445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50757694.

The product of its digits is 1075200, while the sum is 46.

The square root of 253788445 is about 15930.7389972970. The cubic root of 253788445 is about 633.1266797302.

The spelling of 253788445 in words is "two hundred fifty-three million, seven hundred eighty-eight thousand, four hundred forty-five".