257849396 has 24 divisors (see below), whose sum is σ = 519642816. Its totient is φ = 109661760.

The previous prime is 257849381. The next prime is 257849453. The reversal of 257849396 is 693948752.

It is a happy number.

It is a super-2 number, since 2×257849396² = 132972622035129632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31481 + ... + 38816.

It is an arithmetic number, because the mean of its divisors is an integer number (21651784).

Almost surely, 2^257849396 is an apocalyptic number.

It is an amenable number.

257849396 is an abundant number, since it is smaller than the sum of its proper divisors (261793420).

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

257849396 is a wasteful number, since it uses less digits than its factorization.

257849396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70439 (or 70437 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 53.

The square root of 257849396 is about 16057.6896221094. The cubic root of 257849396 is about 636.4857811772.

The spelling of 257849396 in words is "two hundred fifty-seven million, eight hundred forty-nine thousand, three hundred ninety-six".