2180978 has 8 divisors (see below), whose sum is σ = 3317760. Its totient is φ = 1075060.

The previous prime is 2180963. The next prime is 2180993. The reversal of 2180978 is 8790812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2180963) and next prime (2180993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7538 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (414720).

2^2180978 is an apocalyptic number.

2180978 is a deficient number, since it is larger than the sum of its proper divisors (1136782).

2180978 is a wasteful number, since it uses less digits than its factorization.

2180978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15432.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2180978 is about 1476.8134614771. The cubic root of 2180978 is about 129.6832128936.

The spelling of 2180978 in words is "two million, one hundred eighty thousand, nine hundred seventy-eight".