78035649 has 16 divisors (see below), whose sum is σ = 107864064. Its totient is φ = 50130000.

The previous prime is 78035623. The next prime is 78035681. The reversal of 78035649 is 94653087.

It is a happy number.

It is not a de Polignac number, because 78035649 - 2⁸ = 78035393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78035649.

It is not an unprimeable number, because it can be changed into a prime (78035689) 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, 21672 + ... + 25014.

It is an arithmetic number, because the mean of its divisors is an integer number (6741504).

Almost surely, 2^78035649 is an apocalyptic number.

It is an amenable number.

78035649 is a deficient number, since it is larger than the sum of its proper divisors (29828415).

78035649 is a wasteful number, since it uses less digits than its factorization.

78035649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3628.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 78035649 is about 8833.7788629782. The cubic root of 78035649 is about 427.3309505674.

The spelling of 78035649 in words is "seventy-eight million, thirty-five thousand, six hundred forty-nine".