257485144 has 16 divisors (see below), whose sum is σ = 551754000. Its totient is φ = 110350752.

The previous prime is 257485117. The next prime is 257485147. The reversal of 257485144 is 441584752.

It is a junction number, because it is equal to n+sod(n) for n = 257485097 and 257485106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257485147) 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, 2298919 + ... + 2299030.

It is an arithmetic number, because the mean of its divisors is an integer number (34484625).

Almost surely, 2^257485144 is an apocalyptic number.

It is an amenable number.

257485144 is an abundant number, since it is smaller than the sum of its proper divisors (294268856).

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

257485144 is a wasteful number, since it uses less digits than its factorization.

257485144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597962 (or 4597958 counting only the distinct ones).

The product of its digits is 179200, while the sum is 40.

The square root of 257485144 is about 16046.3436333640. The cubic root of 257485144 is about 636.1859285260.

The spelling of 257485144 in words is "two hundred fifty-seven million, four hundred eighty-five thousand, one hundred forty-four".