2290778 has 8 divisors (see below), whose sum is σ = 3927072. Its totient is φ = 981756.

The previous prime is 2290751. The next prime is 2290789. The reversal of 2290778 is 8770922.

2290778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 81800 + ... + 81827.

It is an arithmetic number, because the mean of its divisors is an integer number (490884).

2^2290778 is an apocalyptic number.

2290778 is a deficient number, since it is larger than the sum of its proper divisors (1636294).

2290778 is a wasteful number, since it uses less digits than its factorization.

2290778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163636.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 2290778 is about 1513.5316316483. The cubic root of 2290778 is about 131.8239541738.

The spelling of 2290778 in words is "two million, two hundred ninety thousand, seven hundred seventy-eight".