78042756 has 24 divisors (see below), whose sum is σ = 198654624. Its totient is φ = 23649280.

The previous prime is 78042751. The next prime is 78042787. The reversal of 78042756 is 65724087.

It is not an unprimeable number, because it can be changed into a prime (78042751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295485 + ... + 295748.

It is an arithmetic number, because the mean of its divisors is an integer number (8277276).

Almost surely, 2^78042756 is an apocalyptic number.

It is an amenable number.

78042756 is an abundant number, since it is smaller than the sum of its proper divisors (120611868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78042756 is a wasteful number, since it uses less digits than its factorization.

78042756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591251 (or 591249 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 78042756 is about 8834.1811165495. The cubic root of 78042756 is about 427.3439230525.

The spelling of 78042756 in words is "seventy-eight million, forty-two thousand, seven hundred fifty-six".