257453020 has 48 divisors (see below), whose sum is σ = 594115200. Its totient is φ = 92934720.

The previous prime is 257453011. The next prime is 257453033. The reversal of 257453020 is 20354752.

257453020 = T₄₄ + T₄₅ + ... + T₁₁₅₅.

It is a self number, because there is not a number n which added to its sum of digits gives 257453020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26371 + ... + 34789.

It is an arithmetic number, because the mean of its divisors is an integer number (12377400).

Almost surely, 2^257453020 is an apocalyptic number.

257453020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257453020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297057600).

257453020 is an abundant number, since it is smaller than the sum of its proper divisors (336662180).

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

257453020 is a wasteful number, since it uses less digits than its factorization.

257453020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8578 (or 8576 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 257453020 is about 16045.3426264446. The cubic root of 257453020 is about 636.1594704471.

The spelling of 257453020 in words is "two hundred fifty-seven million, four hundred fifty-three thousand, twenty".