253447128 has 48 divisors (see below), whose sum is σ = 748823400. Its totient is φ = 76801920.

The previous prime is 253447121. The next prime is 253447147. The reversal of 253447128 is 821744352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 253447092 and 253447101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253447121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159213 + ... + 160796.

Almost surely, 2^253447128 is an apocalyptic number.

It is an amenable number.

253447128 is an abundant number, since it is smaller than the sum of its proper divisors (495376272).

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

253447128 is a wasteful number, since it uses less digits than its factorization.

253447128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320032 (or 320025 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 253447128 is about 15920.0228643052. The cubic root of 253447128 is about 632.8427242665.

The spelling of 253447128 in words is "two hundred fifty-three million, four hundred forty-seven thousand, one hundred twenty-eight".