56671812 has 60 divisors (see below), whose sum is σ = 156881340. Its totient is φ = 17777664.

The previous prime is 56671789. The next prime is 56671843. The reversal of 56671812 is 21817665.

It can be written as a sum of positive squares in 2 ways, for example, as 47527236 + 9144576 = 6894^2 + 3024^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 364 + ... + 10652.

It is an arithmetic number, because the mean of its divisors is an integer number (2614689).

Almost surely, 2^56671812 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 56671812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78440670).

56671812 is an abundant number, since it is smaller than the sum of its proper divisors (100209528).

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

56671812 is a wasteful number, since it uses less digits than its factorization.

56671812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10322 (or 10311 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 56671812 is about 7528.0682781176. The cubic root of 56671812 is about 384.1100758650.

The spelling of 56671812 in words is "fifty-six million, six hundred seventy-one thousand, eight hundred twelve".