258278562 has 12 divisors (see below), whose sum is σ = 559603590. Its totient is φ = 86092848.

The previous prime is 258278561. The next prime is 258278627. The reversal of 258278562 is 265872852.

258278562 is a `hidden beast` number, since 2 + 5 + 82 + 7 + 8 + 562 = 666.

It can be written as a sum of positive squares in only one way, i.e., 258277041 + 1521 = 16071^2 + 39^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (258278561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7174387 + ... + 7174422.

Almost surely, 2^258278562 is an apocalyptic number.

258278562 is an abundant number, since it is smaller than the sum of its proper divisors (301325028).

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

258278562 is a wasteful number, since it uses less digits than its factorization.

258278562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14348817 (or 14348814 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 258278562 is about 16071.0473211922. The cubic root of 258278562 is about 636.8387089616.

It can be divided in two parts, 258278 and 562, that added together give a triangular number (258840 = T₇₁₉).

The spelling of 258278562 in words is "two hundred fifty-eight million, two hundred seventy-eight thousand, five hundred sixty-two".