2176840 has 16 divisors (see below), whose sum is σ = 4897980. Its totient is φ = 870720.

The previous prime is 2176831. The next prime is 2176843. The reversal of 2176840 is 486712.

2176840 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2125764 + 51076 = 1458^2 + 226^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 7 + 6⁶ + 8⁵ + 4⁴ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 2176799 and 2176808.

It is not an unprimeable number, because it can be changed into a prime (2176843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27171 + ... + 27250.

2^2176840 is an apocalyptic number.

2176840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2176840 is an abundant number, since it is smaller than the sum of its proper divisors (2721140).

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

2176840 is a wasteful number, since it uses less digits than its factorization.

2176840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54432 (or 54428 counting only the distinct ones).

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

The square root of 2176840 is about 1475.4118069204. The cubic root of 2176840 is about 129.6011443785.

The spelling of 2176840 in words is "two million, one hundred seventy-six thousand, eight hundred forty".