76787878 has 12 divisors (see below), whose sum is σ = 122356692. Its totient is φ = 36135200.

The previous prime is 76787863. The next prime is 76787881. The reversal of 76787878 is 87878767.

76787878 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65848 + ... + 67003.

It is an arithmetic number, because the mean of its divisors is an integer number (10196391).

Almost surely, 2^76787878 is an apocalyptic number.

76787878 is a deficient number, since it is larger than the sum of its proper divisors (45568814).

76787878 is a wasteful number, since it uses less digits than its factorization.

76787878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132887 (or 132870 counting only the distinct ones).

The product of its digits is 7375872, while the sum is 58.

The square root of 76787878 is about 8762.8692789520. The cubic root of 76787878 is about 425.0410626991.

The spelling of 76787878 in words is "seventy-six million, seven hundred eighty-seven thousand, eight hundred seventy-eight".