76978844 has 6 divisors (see below), whose sum is σ = 134712984. Its totient is φ = 38489420.

The previous prime is 76978841. The next prime is 76978849. The reversal of 76978844 is 44887967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76978841) 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 as a sum of consecutive naturals, namely, 9622352 + ... + 9622359.

It is an arithmetic number, because the mean of its divisors is an integer number (22452164).

Almost surely, 2^76978844 is an apocalyptic number.

It is an amenable number.

76978844 is a deficient number, since it is larger than the sum of its proper divisors (57734140).

76978844 is a wasteful number, since it uses less digits than its factorization.

76978844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19244715 (or 19244713 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The square root of 76978844 is about 8773.7588296009. The cubic root of 76978844 is about 425.3931199935.

The spelling of 76978844 in words is "seventy-six million, nine hundred seventy-eight thousand, eight hundred forty-four".