78406056 has 40 divisors (see below), whose sum is σ = 219611370. Its totient is φ = 26135136.

The previous prime is 78406051. The next prime is 78406079. The reversal of 78406056 is 65060487.

It is a happy number.

78406056 is a `hidden beast` number, since 7 + 8 + 40 + 605 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67076100 + 11329956 = 8190^2 + 3366^2 .

It is a super-2 number, since 2×78406056² = 12295019234950272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 78406056.

It is not an unprimeable number, because it can be changed into a prime (78406051) 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 9 ways as a sum of consecutive naturals, for example, 59851 + ... + 61146.

Almost surely, 2^78406056 is an apocalyptic number.

It is an amenable number.

78406056 is an abundant number, since it is smaller than the sum of its proper divisors (141205314).

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

78406056 is a wasteful number, since it uses less digits than its factorization.

78406056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121015 (or 121002 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 78406056 is about 8854.7194196090. The cubic root of 78406056 is about 428.0060120855.

The spelling of 78406056 in words is "seventy-eight million, four hundred six thousand, fifty-six".