257092389 has 24 divisors (see below), whose sum is σ = 376772760. Its totient is φ = 168910848.

The previous prime is 257092379. The next prime is 257092421. The reversal of 257092389 is 983290752.

It can be written as a sum of positive squares in 4 ways, for example, as 13264164 + 243828225 = 3642^2 + 15615^2 .

It is not a de Polignac number, because 257092389 - 2⁸ = 257092133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257092379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276277 + ... + 277205.

It is an arithmetic number, because the mean of its divisors is an integer number (15698865).

Almost surely, 2^257092389 is an apocalyptic number.

It is an amenable number.

257092389 is a deficient number, since it is larger than the sum of its proper divisors (119680371).

257092389 is a wasteful number, since it uses less digits than its factorization.

257092389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 257092389 is about 16034.1008166969. The cubic root of 257092389 is about 635.8622951541.

The spelling of 257092389 in words is "two hundred fifty-seven million, ninety-two thousand, three hundred eighty-nine".