578240781 has 8 divisors (see below), whose sum is σ = 773318304. Its totient is φ = 384328560.

The previous prime is 578240717. The next prime is 578240783. The reversal of 578240781 is 187042875.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 578240781 - 2⁶ = 578240717 is a prime.

It is a super-2 number, since 2×578240781² = 668724801622979922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (578240783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290166 + ... + 292151.

It is an arithmetic number, because the mean of its divisors is an integer number (96664788).

Almost surely, 2^578240781 is an apocalyptic number.

It is an amenable number.

578240781 is a deficient number, since it is larger than the sum of its proper divisors (195077523).

578240781 is a wasteful number, since it uses less digits than its factorization.

578240781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582651.

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 578240781 is about 24046.6376235847. The cubic root of 578240781 is about 833.1110711603. Note that the first 3 decimals are identical.

The spelling of 578240781 in words is "five hundred seventy-eight million, two hundred forty thousand, seven hundred eighty-one".