2981778 has 8 divisors (see below), whose sum is σ = 5963568. Its totient is φ = 993924.

The previous prime is 2981777. The next prime is 2981779. The reversal of 2981778 is 8771892.

It is an interprime number because it is at equal distance from previous prime (2981777) and next prime (2981779).

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

2981778 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2981773) 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, 248476 + ... + 248487.

It is an arithmetic number, because the mean of its divisors is an integer number (745446).

2^2981778 is an apocalyptic number.

2981778 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.

2981778 is a wasteful number, since it uses less digits than its factorization.

2981778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496968.

The product of its digits is 56448, while the sum is 42.

The square root of 2981778 is about 1726.7825572434. The cubic root of 2981778 is about 143.9323563468.

The spelling of 2981778 in words is "two million, nine hundred eighty-one thousand, seven hundred seventy-eight".