257980490 has 8 divisors (see below), whose sum is σ = 464364900. Its totient is φ = 103192192.

The previous prime is 257980483. The next prime is 257980493. The reversal of 257980490 is 94089752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 255904009 + 2076481 = 15997^2 + 1441^2 .

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

It is a super-3 number, since 3×257980490³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (257980493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12899015 + ... + 12899034.

Almost surely, 2^257980490 is an apocalyptic number.

257980490 is a deficient number, since it is larger than the sum of its proper divisors (206384410).

257980490 is a wasteful number, since it uses less digits than its factorization.

257980490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25798056.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 257980490 is about 16061.7710729546. The cubic root of 257980490 is about 636.5936287964.

The spelling of 257980490 in words is "two hundred fifty-seven million, nine hundred eighty thousand, four hundred ninety".