257243828 has 12 divisors (see below), whose sum is σ = 464698752. Its totient is φ = 124472760.

The previous prime is 257243827. The next prime is 257243837. The reversal of 257243828 is 828342752.

It is a happy number.

257243828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257243827) 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, 1037150 + ... + 1037397.

It is an arithmetic number, because the mean of its divisors is an integer number (38724896).

Almost surely, 2^257243828 is an apocalyptic number.

It is an amenable number.

257243828 is a deficient number, since it is larger than the sum of its proper divisors (207454924).

257243828 is a wasteful number, since it uses less digits than its factorization.

257243828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074582 (or 2074580 counting only the distinct ones).

The product of its digits is 215040, while the sum is 41.

The square root of 257243828 is about 16038.8225253601. The cubic root of 257243828 is about 635.9871211611.

The spelling of 257243828 in words is "two hundred fifty-seven million, two hundred forty-three thousand, eight hundred twenty-eight".