578221863 has 12 divisors (see below), whose sum is σ = 805942200. Its totient is φ = 368720176.

The previous prime is 578221841. The next prime is 578221873. The reversal of 578221863 is 368122875.

It is not a de Polignac number, because 578221863 - 2¹⁸ = 577959719 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (578221873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180588 + ... + 183761.

It is an arithmetic number, because the mean of its divisors is an integer number (67161850).

Almost surely, 2^578221863 is an apocalyptic number.

578221863 is a deficient number, since it is larger than the sum of its proper divisors (227720337).

578221863 is a wasteful number, since it uses less digits than its factorization.

578221863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364398 (or 364375 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 578221863 is about 24046.2442597592. The cubic root of 578221863 is about 833.1019855754.

It can be divided in two parts, 57822 and 1863, that added together give a triangular number (59685 = T₃₄₅).

The spelling of 578221863 in words is "five hundred seventy-eight million, two hundred twenty-one thousand, eight hundred sixty-three".