78448045 has 16 divisors (see below), whose sum is σ = 104877360. Its totient is φ = 55931904.

The previous prime is 78448043. The next prime is 78448057. The reversal of 78448045 is 54084487.

It can be written as a sum of positive squares in 8 ways, for example, as 1394761 + 77053284 = 1181^2 + 8778^2 .

It is a cyclic number.

It is not a de Polignac number, because 78448045 - 2¹ = 78448043 is a prime.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 78447989 and 78448007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78448043) 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 15 ways as a sum of consecutive naturals, for example, 18924 + ... + 22693.

It is an arithmetic number, because the mean of its divisors is an integer number (6554835).

Almost surely, 2^78448045 is an apocalyptic number.

It is an amenable number.

78448045 is a deficient number, since it is larger than the sum of its proper divisors (26429315).

78448045 is a wasteful number, since it uses less digits than its factorization.

78448045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41664.

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 78448045 is about 8857.0900977691. The cubic root of 78448045 is about 428.0824021766.

The spelling of 78448045 in words is "seventy-eight million, four hundred forty-eight thousand, forty-five".