258648946 has 4 divisors (see below), whose sum is σ = 387973422. Its totient is φ = 129324472.

The previous prime is 258648937. The next prime is 258648947. The reversal of 258648946 is 649846852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 250747225 + 7901721 = 15835^2 + 2811^2 .

It is a junction number, because it is equal to n+sod(n) for n = 258648893 and 258648902.

It is not an unprimeable number, because it can be changed into a prime (258648947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64662235 + ... + 64662238.

Almost surely, 2^258648946 is an apocalyptic number.

258648946 is a deficient number, since it is larger than the sum of its proper divisors (129324476).

258648946 is a wasteful number, since it uses less digits than its factorization.

258648946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129324475.

The product of its digits is 3317760, while the sum is 52.

The square root of 258648946 is about 16082.5665240347. The cubic root of 258648946 is about 637.1429827714.

The spelling of 258648946 in words is "two hundred fifty-eight million, six hundred forty-eight thousand, nine hundred forty-six".