78489763 has 16 divisors (see below), whose sum is σ = 87442560. Its totient is φ = 69854400.

The previous prime is 78489757. The next prime is 78489793. The reversal of 78489763 is 36798487.

It is a happy number.

It is not a de Polignac number, because 78489763 - 2¹⁷ = 78358691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78489763.

It is not an unprimeable number, because it can be changed into a prime (78489713) 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, 206908 + ... + 207286.

It is an arithmetic number, because the mean of its divisors is an integer number (5465160).

Almost surely, 2^78489763 is an apocalyptic number.

78489763 is a deficient number, since it is larger than the sum of its proper divisors (8952797).

78489763 is a wasteful number, since it uses less digits than its factorization.

78489763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738.

The product of its digits is 2032128, while the sum is 52.

The square root of 78489763 is about 8859.4448471673. Note that the first 3 decimals coincide. The cubic root of 78489763 is about 428.1582722503.

The spelling of 78489763 in words is "seventy-eight million, four hundred eighty-nine thousand, seven hundred sixty-three".