2820778 has 8 divisors (see below), whose sum is σ = 4453920. Its totient is φ = 1336140.

The previous prime is 2820773. The next prime is 2820781. The reversal of 2820778 is 8770282.

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

It is a super-3 number, since 3×2820778³ = 67333002068320652856, which contains 333 as substring.

It is a plaindrome in base 13 and base 15.

It is not an unprimeable number, because it can be changed into a prime (2820773) 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, 37078 + ... + 37153.

It is an arithmetic number, because the mean of its divisors is an integer number (556740).

2^2820778 is an apocalyptic number.

2820778 is a deficient number, since it is larger than the sum of its proper divisors (1633142).

2820778 is a wasteful number, since it uses less digits than its factorization.

2820778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74252.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 2820778 is about 1679.5171925289. The cubic root of 2820778 is about 141.2937557292.

The spelling of 2820778 in words is "two million, eight hundred twenty thousand, seven hundred seventy-eight".