78448305 has 16 divisors (see below), whose sum is σ = 135172800. Its totient is φ = 38620608.

The previous prime is 78448303. The next prime is 78448309. The reversal of 78448305 is 50384487.

It is not a de Polignac number, because 78448305 - 2¹ = 78448303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (78448303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200955 + ... + 201344.

It is an arithmetic number, because the mean of its divisors is an integer number (8448300).

Almost surely, 2^78448305 is an apocalyptic number.

It is an amenable number.

78448305 is a deficient number, since it is larger than the sum of its proper divisors (56724495).

78448305 is a wasteful number, since it uses less digits than its factorization.

78448305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402320.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 78448305 is about 8857.1047752638. The cubic root of 78448305 is about 428.0828751066.

The spelling of 78448305 in words is "seventy-eight million, four hundred forty-eight thousand, three hundred five".