78486224 has 10 divisors (see below), whose sum is σ = 152067090. Its totient is φ = 39243104.

The previous prime is 78486217. The next prime is 78486251. The reversal of 78486224 is 42268487.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 8596624 = 8360^2 + 2932^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2452679 + ... + 2452710.

It is an arithmetic number, because the mean of its divisors is an integer number (15206709).

Almost surely, 2^78486224 is an apocalyptic number.

It is an amenable number.

78486224 is a deficient number, since it is larger than the sum of its proper divisors (73580866).

78486224 is a wasteful number, since it uses less digits than its factorization.

78486224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905397 (or 4905391 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 78486224 is about 8859.2451145682. The cubic root of 78486224 is about 428.1518371228.

The spelling of 78486224 in words is "seventy-eight million, four hundred eighty-six thousand, two hundred twenty-four".