253043478 has 24 divisors (see below), whose sum is σ = 555204000. Its totient is φ = 83279664.

The previous prime is 253043449. The next prime is 253043489. The reversal of 253043478 is 874340352.

It is a happy number.

253043478 is a `hidden beast` number, since 2 + 5 + 304 + 347 + 8 = 666.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 87553 + ... + 90396.

It is an arithmetic number, because the mean of its divisors is an integer number (23133500).

Almost surely, 2^253043478 is an apocalyptic number.

253043478 is an abundant number, since it is smaller than the sum of its proper divisors (302160522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253043478 is a wasteful number, since it uses less digits than its factorization.

253043478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178036 (or 178033 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 253043478 is about 15907.3403810945. The cubic root of 253043478 is about 632.5065822350.

It can be divided in two parts, 25304 and 3478, that added together give a palindrome (28782).

The spelling of 253043478 in words is "two hundred fifty-three million, forty-three thousand, four hundred seventy-eight".