257028329 has 8 divisors (see below), whose sum is σ = 264376992. Its totient is φ = 249742080.

The previous prime is 257028313. The next prime is 257028337. The reversal of 257028329 is 923820752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257028329 - 2⁴ = 257028313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257028292 and 257028301.

It is not an unprimeable number, because it can be changed into a prime (257028229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7187 + ... + 23784.

It is an arithmetic number, because the mean of its divisors is an integer number (33047124).

Almost surely, 2^257028329 is an apocalyptic number.

It is an amenable number.

257028329 is a deficient number, since it is larger than the sum of its proper divisors (7348663).

257028329 is a wasteful number, since it uses less digits than its factorization.

257028329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31207.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 257028329 is about 16032.1030747685. The cubic root of 257028329 is about 635.8094779257.

The spelling of 257028329 in words is "two hundred fifty-seven million, twenty-eight thousand, three hundred twenty-nine".