2979978 has 16 divisors (see below), whose sum is σ = 6073056. Its totient is φ = 974480.

The previous prime is 2979971. The next prime is 2979989. The reversal of 2979978 is 8799792.

It is a happy number.

2979978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2979978.

It is not an unprimeable number, because it can be changed into a prime (2979971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4368 + ... + 5003.

It is an arithmetic number, because the mean of its divisors is an integer number (379566).

2^2979978 is an apocalyptic number.

2979978 is an abundant number, since it is smaller than the sum of its proper divisors (3093078).

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

2979978 is a wasteful number, since it uses less digits than its factorization.

2979978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9429.

The product of its digits is 571536, while the sum is 51.

The square root of 2979978 is about 1726.2612780225. The cubic root of 2979978 is about 143.9033881282.

The spelling of 2979978 in words is "two million, nine hundred seventy-nine thousand, nine hundred seventy-eight".