2782978 has 8 divisors (see below), whose sum is σ = 4554000. Its totient is φ = 1264980.

The previous prime is 2782973. The next prime is 2782981. The reversal of 2782978 is 8792872.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2782973) 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, 63228 + ... + 63271.

It is an arithmetic number, because the mean of its divisors is an integer number (569250).

2^2782978 is an apocalyptic number.

2782978 is a deficient number, since it is larger than the sum of its proper divisors (1771022).

2782978 is a wasteful number, since it uses less digits than its factorization.

2782978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126512.

The product of its digits is 112896, while the sum is 43.

The square root of 2782978 is about 1668.2260038736. The cubic root of 2782978 is about 140.6597769462.

The spelling of 2782978 in words is "two million, seven hundred eighty-two thousand, nine hundred seventy-eight".