76978456 has 16 divisors (see below), whose sum is σ = 148991040. Its totient is φ = 37247520.

The previous prime is 76978423. The next prime is 76978459. The reversal of 76978456 is 65487967.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76978459) by changing a digit.

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, 154951 + ... + 155446.

It is an arithmetic number, because the mean of its divisors is an integer number (9311940).

Almost surely, 2^76978456 is an apocalyptic number.

It is an amenable number.

76978456 is a deficient number, since it is larger than the sum of its proper divisors (72012584).

76978456 is a wasteful number, since it uses less digits than its factorization.

76978456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310434 (or 310430 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The square root of 76978456 is about 8773.7367181834. The cubic root of 76978456 is about 425.3924052829.

The spelling of 76978456 in words is "seventy-six million, nine hundred seventy-eight thousand, four hundred fifty-six".