258028578 has 48 divisors (see below), whose sum is σ = 582437856. Its totient is φ = 85613760.

The previous prime is 258028523. The next prime is 258028583. The reversal of 258028578 is 875820852.

258028578 is a `hidden beast` number, since 2 + 58 + 0 + 28 + 578 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116025 + ... + 118227.

It is an arithmetic number, because the mean of its divisors is an integer number (12134122).

Almost surely, 2^258028578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258028578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291218928).

258028578 is an abundant number, since it is smaller than the sum of its proper divisors (324409278).

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

258028578 is a wasteful number, since it uses less digits than its factorization.

258028578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2449 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 258028578 is about 16063.2679738589. The cubic root of 258028578 is about 636.6331803823.

The spelling of 258028578 in words is "two hundred fifty-eight million, twenty-eight thousand, five hundred seventy-eight".