78057268 has 24 divisors (see below), whose sum is σ = 145139904. Its totient is φ = 36604800.

The previous prime is 78057233. The next prime is 78057269. The reversal of 78057268 is 86275087.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78057269) 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, 19303 + ... + 22993.

It is an arithmetic number, because the mean of its divisors is an integer number (6047496).

Almost surely, 2^78057268 is an apocalyptic number.

It is an amenable number.

78057268 is a deficient number, since it is larger than the sum of its proper divisors (67082636).

78057268 is a wasteful number, since it uses less digits than its factorization.

78057268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023 (or 4021 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 78057268 is about 8835.0024335028. The cubic root of 78057268 is about 427.3704095195.

Subtracting from 78057268 its sum of digits (43), we obtain a square (78057225 = 8835²).

The spelling of 78057268 in words is "seventy-eight million, fifty-seven thousand, two hundred sixty-eight".