2173856 has 12 divisors (see below), whose sum is σ = 4279842. Its totient is φ = 1086912.

The previous prime is 2173819. The next prime is 2173877. The reversal of 2173856 is 6583712.

2173856 = T₁₆₃ + T₁₆₄ + ... + T₂₅₈.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 781456 = 1180^2 + 884^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 67933 = 2173856 / (2 + 1 + 7 + 3 + 8 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33935 + ... + 33998.

2^2173856 is an apocalyptic number.

It is an amenable number.

2173856 is a deficient number, since it is larger than the sum of its proper divisors (2105986).

2173856 is an equidigital number, since it uses as much as digits as its factorization.

2173856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67943 (or 67935 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 2173856 is about 1474.4002170374. The cubic root of 2173856 is about 129.5418984595.

The spelling of 2173856 in words is "two million, one hundred seventy-three thousand, eight hundred fifty-six".