78625744 has 10 divisors (see below), whose sum is σ = 152337410. Its totient is φ = 39312864.

The previous prime is 78625727. The next prime is 78625747. The reversal of 78625744 is 44752687.

It can be written as a sum of positive squares in only one way, i.e., 75342400 + 3283344 = 8680^2 + 1812^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78625744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78625747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2457039 + ... + 2457070.

It is an arithmetic number, because the mean of its divisors is an integer number (15233741).

Almost surely, 2^78625744 is an apocalyptic number.

It is an amenable number.

78625744 is a deficient number, since it is larger than the sum of its proper divisors (73711666).

78625744 is a wasteful number, since it uses less digits than its factorization.

78625744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914117 (or 4914111 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 78625744 is about 8867.1158783451. The cubic root of 78625744 is about 428.4053864296.

The spelling of 78625744 in words is "seventy-eight million, six hundred twenty-five thousand, seven hundred forty-four".