78240584 has 16 divisors (see below), whose sum is σ = 146954220. Its totient is φ = 39052800.

The previous prime is 78240577. The next prime is 78240593. The reversal of 78240584 is 48504287.

It can be written as a sum of positive squares in 2 ways, for example, as 61183684 + 17056900 = 7822^2 + 4130^2 .

It is a super-2 number, since 2×78240584² = 12243177969322112, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3329 + ... + 12944.

Almost surely, 2^78240584 is an apocalyptic number.

It is an amenable number.

78240584 is a deficient number, since it is larger than the sum of its proper divisors (68713636).

78240584 is a wasteful number, since it uses less digits than its factorization.

78240584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16880 (or 16876 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 78240584 is about 8845.3707666779. The cubic root of 78240584 is about 427.7047050363.

The spelling of 78240584 in words is "seventy-eight million, two hundred forty thousand, five hundred eighty-four".