2178064 has 20 divisors (see below), whose sum is σ = 4823104. Its totient is φ = 933408.

The previous prime is 2178049. The next prime is 2178073. The reversal of 2178064 is 4608712.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 3 ways as a sum of consecutive naturals, for example, 9612 + ... + 9835.

2^2178064 is an apocalyptic number.

It is an amenable number.

2178064 is an abundant number, since it is smaller than the sum of its proper divisors (2645040).

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

2178064 is a wasteful number, since it uses less digits than its factorization.

2178064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19462 (or 19456 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2178064 is about 1475.8265480740. The cubic root of 2178064 is about 129.6254306647.

It can be divided in two parts, 217 and 8064, that added together give a square (8281 = 91²).

The spelling of 2178064 in words is "two million, one hundred seventy-eight thousand, sixty-four".