78428246 has 16 divisors (see below), whose sum is σ = 127071504. Its totient is φ = 36089184.

The previous prime is 78428237. The next prime is 78428269. The reversal of 78428246 is 64282487.

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 in 7 ways as a sum of consecutive naturals, for example, 4676 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (7941969).

Almost surely, 2^78428246 is an apocalyptic number.

78428246 is a deficient number, since it is larger than the sum of its proper divisors (48643258).

78428246 is a wasteful number, since it uses less digits than its factorization.

78428246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9055.

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

The square root of 78428246 is about 8855.9723350968. The cubic root of 78428246 is about 428.0463854871.

The spelling of 78428246 in words is "seventy-eight million, four hundred twenty-eight thousand, two hundred forty-six".