56691712 has 88 divisors (see below), whose sum is σ = 141488640. Its totient is φ = 22056960.

The previous prime is 56691709. The next prime is 56691721. The reversal of 56691712 is 21719665.

It is a tau number, because it is divible by the number of its divisors (88).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78489 + ... + 79207.

Almost surely, 2^56691712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56691712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70744320).

56691712 is an abundant number, since it is smaller than the sum of its proper divisors (84796928).

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

56691712 is a wasteful number, since it uses less digits than its factorization.

56691712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 739 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 56691712 is about 7529.3898823211. The cubic root of 56691712 is about 384.1550299948.

It can be divided in two parts, 5669 and 1712, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 56691712 in words is "fifty-six million, six hundred ninety-one thousand, seven hundred twelve".