56671738 has 4 divisors (see below), whose sum is σ = 85007610. Its totient is φ = 28335868.

The previous prime is 56671709. The next prime is 56671739. The reversal of 56671738 is 83717665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83717665 = 5 ⋅16743533.

It can be written as a sum of positive squares in only one way, i.e., 53333809 + 3337929 = 7303^2 + 1827^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56671694 and 56671703.

It is not an unprimeable number, because it can be changed into a prime (56671739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14167933 + ... + 14167936.

Almost surely, 2^56671738 is an apocalyptic number.

56671738 is a deficient number, since it is larger than the sum of its proper divisors (28335872).

56671738 is a wasteful number, since it uses less digits than its factorization.

56671738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28335871.

The product of its digits is 211680, while the sum is 43.

The square root of 56671738 is about 7528.0633631765. The cubic root of 56671738 is about 384.1099086792.

The spelling of 56671738 in words is "fifty-six million, six hundred seventy-one thousand, seven hundred thirty-eight".