2113978 has 8 divisors (see below), whose sum is σ = 3337920. Its totient is φ = 1001340.

The previous prime is 2113973. The next prime is 2113987. The reversal of 2113978 is 8793112.

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

It is not an unprimeable number, because it can be changed into a prime (2113973) 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, 27778 + ... + 27853.

It is an arithmetic number, because the mean of its divisors is an integer number (417240).

2^2113978 is an apocalyptic number.

2113978 is a deficient number, since it is larger than the sum of its proper divisors (1223942).

2113978 is a wasteful number, since it uses less digits than its factorization.

2113978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55652.

The product of its digits is 3024, while the sum is 31.

The square root of 2113978 is about 1453.9525439298. The cubic root of 2113978 is about 128.3414143822.

The spelling of 2113978 in words is "two million, one hundred thirteen thousand, nine hundred seventy-eight".