2790978 has 8 divisors (see below), whose sum is σ = 5581968. Its totient is φ = 930324.

The previous prime is 2790971. The next prime is 2790979. The reversal of 2790978 is 8790972.

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

2790978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2790971) 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, 232576 + ... + 232587.

It is an arithmetic number, because the mean of its divisors is an integer number (697746).

2^2790978 is an apocalyptic number.

2790978 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.

2790978 is a wasteful number, since it uses less digits than its factorization.

2790978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465168.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 2790978 is about 1670.6220398403. The cubic root of 2790978 is about 140.7944290689.

The spelling of 2790978 in words is "two million, seven hundred ninety thousand, nine hundred seventy-eight".