78040756 has 6 divisors (see below), whose sum is σ = 136571330. Its totient is φ = 39020376.

The previous prime is 78040747. The next prime is 78040759. The reversal of 78040756 is 65704087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48163600 + 29877156 = 6940^2 + 5466^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78040759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9755091 + ... + 9755098.

Almost surely, 2^78040756 is an apocalyptic number.

It is an amenable number.

78040756 is a deficient number, since it is larger than the sum of its proper divisors (58530574).

78040756 is a wasteful number, since it uses less digits than its factorization.

78040756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19510193 (or 19510191 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 78040756 is about 8834.0679191412. The cubic root of 78040756 is about 427.3402725102.

The spelling of 78040756 in words is "seventy-eight million, forty thousand, seven hundred fifty-six".