78006444 has 12 divisors (see below), whose sum is σ = 182015064. Its totient is φ = 26002144.

The previous prime is 78006431. The next prime is 78006451. The reversal of 78006444 is 44460087.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250257 + ... + 3250280.

It is an arithmetic number, because the mean of its divisors is an integer number (15167922).

Almost surely, 2^78006444 is an apocalyptic number.

It is an amenable number.

78006444 is an abundant number, since it is smaller than the sum of its proper divisors (104008620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78006444 is a wasteful number, since it uses less digits than its factorization.

78006444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500544 (or 6500542 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 78006444 is about 8832.1256784536. The cubic root of 78006444 is about 427.2776340905.

The spelling of 78006444 in words is "seventy-eight million, six thousand, four hundred forty-four".