2127978 has 32 divisors (see below), whose sum is σ = 4777920. Its totient is φ = 702000.

The previous prime is 2127977. The next prime is 2127997. The reversal of 2127978 is 8797212.

It is not an unprimeable number, because it can be changed into a prime (2127971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8353 + ... + 8603.

It is an arithmetic number, because the mean of its divisors is an integer number (149310).

2^2127978 is an apocalyptic number.

2127978 is an abundant number, since it is smaller than the sum of its proper divisors (2649942).

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

2127978 is a wasteful number, since it uses less digits than its factorization.

2127978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 413 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2127978 is about 1458.7590616685. The cubic root of 2127978 is about 128.6241085710.

The spelling of 2127978 in words is "two million, one hundred twenty-seven thousand, nine hundred seventy-eight".