2071978 has 16 divisors (see below), whose sum is σ = 3350016. Its totient is φ = 958320.

The previous prime is 2071973. The next prime is 2071991. The reversal of 2071978 is 8791702.

It is not an unprimeable number, because it can be changed into a prime (2071973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (209376).

2^2071978 is an apocalyptic number.

2071978 is a deficient number, since it is larger than the sum of its proper divisors (1278038).

2071978 is a wasteful number, since it uses less digits than its factorization.

2071978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2071978 is about 1439.4366953777. The cubic root of 2071978 is about 127.4857705509.

The spelling of 2071978 in words is "two million, seventy-one thousand, nine hundred seventy-eight".