2619978 has 16 divisors (see below), whose sum is σ = 5304096. Its totient is φ = 862640.

The previous prime is 2619973. The next prime is 2619997. The reversal of 2619978 is 8799162.

It is not an unprimeable number, because it can be changed into a prime (2619973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133 + ... + 3128.

It is an arithmetic number, because the mean of its divisors is an integer number (331506).

2^2619978 is an apocalyptic number.

2619978 is an abundant number, since it is smaller than the sum of its proper divisors (2684118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2619978 is a wasteful number, since it uses less digits than its factorization.

2619978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349.

The product of its digits is 54432, while the sum is 42.

The square root of 2619978 is about 1618.6346097869. The cubic root of 2619978 is about 137.8581823914.

The spelling of 2619978 in words is "two million, six hundred nineteen thousand, nine hundred seventy-eight".