56684678 has 8 divisors (see below), whose sum is σ = 87769920. Its totient is φ = 27428040.

The previous prime is 56684671. The next prime is 56684699. The reversal of 56684678 is 87648665.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56684671) 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 3 ways as a sum of consecutive naturals, for example, 457073 + ... + 457196.

It is an arithmetic number, because the mean of its divisors is an integer number (10971240).

Almost surely, 2^56684678 is an apocalyptic number.

56684678 is a deficient number, since it is larger than the sum of its proper divisors (31085242).

56684678 is a wasteful number, since it uses less digits than its factorization.

56684678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914302.

The product of its digits is 1935360, while the sum is 50.

The square root of 56684678 is about 7528.9227649113. The cubic root of 56684678 is about 384.1391413805.

Subtracting from 56684678 its sum of digits (50), we obtain a triangular number (56684628 = T₁₀₆₄₇).

The spelling of 56684678 in words is "fifty-six million, six hundred eighty-four thousand, six hundred seventy-eight".