2103978 has 8 divisors (see below), whose sum is σ = 4207968. Its totient is φ = 701324.

The previous prime is 2103977. The next prime is 2103989. The reversal of 2103978 is 8793012.

It is a happy number.

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

2103978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2103973) 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, 175326 + ... + 175337.

It is an arithmetic number, because the mean of its divisors is an integer number (525996).

2^2103978 is an apocalyptic number.

2103978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2103978 is a wasteful number, since it uses less digits than its factorization.

2103978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350668.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2103978 is about 1450.5095656355. The cubic root of 2103978 is about 128.1387249227.

It can be divided in two parts, 2103 and 978, that added together give a triangular number (3081 = T₇₈).

The spelling of 2103978 in words is "two million, one hundred three thousand, nine hundred seventy-eight".