78764481 has 40 divisors (see below), whose sum is σ = 126033600. Its totient is φ = 48872160.

The previous prime is 78764471. The next prime is 78764513. The reversal of 78764481 is 18446787.

It is not a de Polignac number, because 78764481 - 2⁵ = 78764449 is a prime.

It is a super-2 number, since 2×78764481² = 12407686934398722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78764471) 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 39 ways as a sum of consecutive naturals, for example, 93460 + ... + 94298.

It is an arithmetic number, because the mean of its divisors is an integer number (3150840).

Almost surely, 2^78764481 is an apocalyptic number.

It is an amenable number.

78764481 is a deficient number, since it is larger than the sum of its proper divisors (47269119).

78764481 is a wasteful number, since it uses less digits than its factorization.

78764481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 922 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 78764481 is about 8874.9355490618. The cubic root of 78764481 is about 428.6572155412.

The spelling of 78764481 in words is "seventy-eight million, seven hundred sixty-four thousand, four hundred eighty-one".