258786078 has 16 divisors (see below), whose sum is σ = 534268416. Its totient is φ = 83479320.

The previous prime is 258786071. The next prime is 258786079. The reversal of 258786078 is 870687852.

It is a self number, because there is not a number n which added to its sum of digits gives 258786078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258786071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695476 + ... + 695847.

It is an arithmetic number, because the mean of its divisors is an integer number (33391776).

Almost surely, 2^258786078 is an apocalyptic number.

258786078 is an abundant number, since it is smaller than the sum of its proper divisors (275482338).

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

258786078 is a wasteful number, since it uses less digits than its factorization.

258786078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391359.

The product of its (nonzero) digits is 1505280, while the sum is 51.

The square root of 258786078 is about 16086.8293333397. The cubic root of 258786078 is about 637.2555642660.

The spelling of 258786078 in words is "two hundred fifty-eight million, seven hundred eighty-six thousand, seventy-eight".