257844380 has 12 divisors (see below), whose sum is σ = 541473240. Its totient is φ = 103137744.

The previous prime is 257844373. The next prime is 257844437. The reversal of 257844380 is 83448752.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6446090 + ... + 6446129.

It is an arithmetic number, because the mean of its divisors is an integer number (45122770).

Almost surely, 2^257844380 is an apocalyptic number.

257844380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257844380 is an abundant number, since it is smaller than the sum of its proper divisors (283628860).

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

257844380 is a wasteful number, since it uses less digits than its factorization.

257844380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12892228 (or 12892226 counting only the distinct ones).

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

The square root of 257844380 is about 16057.5334344973. The cubic root of 257844380 is about 636.4816539186.

The spelling of 257844380 in words is "two hundred fifty-seven million, eight hundred forty-four thousand, three hundred eighty".